diff --git a/khtml/html/html_imageimpl.cpp b/khtml/html/html_imageimpl.cpp
index be13e93c2..4a5a35f37 100644
--- a/khtml/html/html_imageimpl.cpp
+++ b/khtml/html/html_imageimpl.cpp
@@ -539,12 +539,12 @@ TQRegion HTMLAreaElementImpl::getRegion(int width_, int height_) const
                             m_coords[(i<<1)+1].minWidth(height_));
         region = TQRegion(points);
     }
-    else if (shape==Circle && m_coordsLen>=3 || shape==Unknown && m_coordsLen == 3) {
+    else if ((shape==Circle && m_coordsLen>=3) || (shape==Unknown && m_coordsLen == 3)) {
         int r = kMin(m_coords[2].minWidth(width_), m_coords[2].minWidth(height_));
         region = TQRegion(m_coords[0].minWidth(width_)-r,
                          m_coords[1].minWidth(height_)-r, 2*r, 2*r,TQRegion::Ellipse);
     }
-    else if (shape==Rect && m_coordsLen>=4 || shape==Unknown && m_coordsLen == 4) {
+    else if ((shape==Rect && m_coordsLen>=4) || (shape==Unknown && m_coordsLen == 4)) {
         int x0 = m_coords[0].minWidth(width_);
         int y0 = m_coords[1].minWidth(height_);
         int x1 = m_coords[2].minWidth(width_);
diff --git a/khtml/html/htmltokenizer.cpp b/khtml/html/htmltokenizer.cpp
index 5da6edd14..9de68e708 100644
--- a/khtml/html/htmltokenizer.cpp
+++ b/khtml/html/htmltokenizer.cpp
@@ -1385,11 +1385,11 @@ void HTMLTokenizer::write( const TokenizerString &str, bool appendData )
         else if ( startTag )
         {
             startTag = false;
-            bool endTag = false;
+            // bool endTag = false;
 
             switch(cc) {
             case '/':
-                endTag = true;
+                // endTag = true;
                 break;
             case '!':
             {
@@ -1440,11 +1440,14 @@ void HTMLTokenizer::write( const TokenizerString &str, bool appendData )
             // immediately before an endtag should be ignored.
             // ### Gecko and MSIE though only ignores LF immediately after
             // starttags and only for PRE elements -- asj (28/06-2005)
-            if ( pending )
-                if (!select)
+            if ( pending ) {
+                if (!select) {
                     addPending();
-                else
+                }
+                else {
                     pending = NonePending;
+                }
+            }
 
             // Cancel unused discards
             discard = NoneDiscard;
diff --git a/khtml/rendering/bidi.cpp b/khtml/rendering/bidi.cpp
index bd010047a..c41b27b69 100644
--- a/khtml/rendering/bidi.cpp
+++ b/khtml/rendering/bidi.cpp
@@ -35,8 +35,9 @@
 #include "tqfontmetrics.h"
 
 #define BIDI_DEBUG 0
-//#define DEBUG_LINEBREAKS
-//#define PAGE_DEBUG
+// #define DEBUG_LINEBREAKS
+// #define DEBUG_LAYOUT
+// #define PAGE_DEBUG
 
 namespace khtml {
 
@@ -701,8 +702,12 @@ void RenderBlock::computeHorizontalPositionsForLine(InlineFlowBox* lineBox, Bidi
         if (r->obj->isPositioned())
             continue; // Positioned objects are only participating to figure out their
                       // correct static x position.  They have no effect on the width.
-        if (r->obj->isText())
+        if (r->obj->isText()) {
             r->box->setWidth(static_cast<RenderText *>(r->obj)->width(r->start, r->stop-r->start, m_firstLine));
+#ifdef DEBUG_LAYOUT
+            kdDebug( 6040 ) << renderName() << " computeHorizontalPositionsForLine() set text box width: " << r->box->width() << endl;
+#endif
+        }
         else if (!r->obj->isInlineFlow()) {
             r->obj->calcWidth();
             r->box->setWidth(r->obj->width());
@@ -776,6 +781,10 @@ void RenderBlock::computeHorizontalPositionsForLine(InlineFlowBox* lineBox, Bidi
         m_overflowWidth = rightPos; // FIXME: Work for rtl overflow also.
     if (x < 0)
         m_overflowLeft = kMin(m_overflowLeft, x);
+
+#ifdef DEBUG_LAYOUT
+    kdDebug( 6040 ) << renderName() << " computeHorizontalPositionsForLine() m_overflowWidth: " << m_overflowWidth << " m_overflowLeft: " << m_overflowLeft << endl;
+#endif
 }
 
 void RenderBlock::computeVerticalPositionsForLine(InlineFlowBox* lineBox)
@@ -865,6 +874,9 @@ bool RenderBlock::clearLineOfPageBreaks(InlineFlowBox* lineBox)
         }
         if (doPageBreak) {
             int pTop = pageTopAfter(lineBox->yPos());
+#ifdef PAGE_DEBUG
+            int oldYPos = lineBox->yPos();
+#endif
 
             m_height = pTop;
             lineBox->setAfterPageBreak(true);
@@ -1254,8 +1266,8 @@ void RenderBlock::bidiReorderLine(const BidiIterator &start, const BidiIterator
     }
 
 #if BIDI_DEBUG > 0
-    kdDebug(6041) << "reached end of line current=" << current.obj << "/" << current.pos
-		  << ", eor=" << eor.obj << "/" << eor.pos << endl;
+    kdDebug(6041) << "reached end of line current=" << bidi.current.obj << "/" << bidi.current.pos
+		  << ", eor=" << bidi.eor.obj << "/" << bidi.eor.pos << endl;
 #endif
     if ( !emptyRun && bidi.sor != bidi.current ) {
 	    bidi.eor = bidi.last;
@@ -1286,9 +1298,7 @@ void RenderBlock::bidiReorderLine(const BidiIterator &start, const BidiIterator
 #if BIDI_DEBUG > 0
     kdDebug(6041) << "lineLow = " << (uint)levelLow << ", lineHigh = " << (uint)levelHigh << endl;
     kdDebug(6041) << "logical order is:" << endl;
-    TQPtrListIterator<BidiRun> it2(runs);
-    BidiRun *r2;
-    for ( ; (r2 = it2.current()); ++it2 )
+    for (BidiRun* r2 = sFirstBidiRun; r2; r2 = r2->nextRun)
         kdDebug(6041) << "    " << r2 << "  start=" << r2->start << "  stop=" << r2->stop << "  level=" << (uint)r2->level << endl;
 #endif
 
@@ -1318,7 +1328,7 @@ void RenderBlock::bidiReorderLine(const BidiIterator &start, const BidiIterator
 
 #if BIDI_DEBUG > 0
     kdDebug(6041) << "visual order is:" << endl;
-    for (BidiRun* curr = sFirstRun; curr; curr = curr->nextRun)
+    for (BidiRun* curr = sFirstBidiRun; curr; curr = curr->nextRun)
         kdDebug(6041) << "    " << curr << endl;
 #endif
 }
diff --git a/khtml/rendering/render_block.cpp b/khtml/rendering/render_block.cpp
index ccbb6fad0..c941315e2 100644
--- a/khtml/rendering/render_block.cpp
+++ b/khtml/rendering/render_block.cpp
@@ -230,11 +230,9 @@ void RenderBlock::updateFirstLetter()
             while ( length < oldText->l && (oldText->s+length)->isSpace() )
                 length++;
             begin = length;
-            while ( length < oldText->l &&
-                    ( (oldText->s+length)->isPunct()) || (oldText->s+length)->isSpace() )
+            while ( (length < oldText->l && ( (oldText->s+length)->isPunct())) || (oldText->s+length)->isSpace() )
                 length++;
-            if ( length < oldText->l &&
-                    !( (oldText->s+length)->isSpace() || (oldText->s+length)->isPunct() ))
+            if ( length < oldText->l && !( (oldText->s+length)->isSpace() || (oldText->s+length)->isPunct() ))
                 length++;
             while ( length < oldText->l && (oldText->s+length)->isMark() )
                 length++;
@@ -1466,6 +1464,10 @@ void RenderBlock::layoutBlockChildren( bool relayoutChildren )
         m_overflowHeight = kMax(effY + child->effectiveHeight(), m_overflowHeight);
         m_overflowTop = kMin(effY, m_overflowTop);
 
+#ifdef PAGE_DEBUG
+        kdDebug(6040) << renderName() << "(RenderBlock)::layoutBlockChildren(" << relayoutChildren << ") effX: " << effX << " effY: " << effY << " child: " << child << " child->effectiveWidth(): " << child->effectiveWidth() << " child->effectiveHeight(): " << child->effectiveHeight() << endl;
+#endif
+
         // Insert our compact into the block margin if we have one.
         insertCompactIfNeeded(child, compactInfo);
 
@@ -2168,6 +2170,9 @@ int RenderBlock::rightmostPosition(bool includeOverflowInterior, bool includeSel
         }
     }
 
+#ifdef PAGE_DEBUG
+    kdDebug(6040) << renderName() << "(RenderBlock)::rightmostPosition(" << includeOverflowInterior << "," << includeSelf << ") Rightmost position: " << right << " overflow width: " << m_overflowWidth << endl;
+#endif
     return right;
 }
 
@@ -2184,6 +2189,9 @@ int RenderBlock::rightmostAbsolutePosition() const
         int rp = r->xPos() + r->rightmostPosition(false);
         right = kMax(right, rp);
     }
+#ifdef PAGE_DEBUG
+    kdDebug(6040) << renderName() << " Rightmost absolute position: " << right << endl;
+#endif
     return right;
 }
 
diff --git a/khtml/rendering/render_canvas.cpp b/khtml/rendering/render_canvas.cpp
index e8540eba6..c73b94841 100644
--- a/khtml/rendering/render_canvas.cpp
+++ b/khtml/rendering/render_canvas.cpp
@@ -319,7 +319,7 @@ void RenderCanvas::paint(PaintInfo& paintInfo, int _tx, int _ty)
         _ty += m_view->contentsY();
     }
 
-    outlineBox(p, _tx, _ty);
+    outlineBox(paintInfo.p, _tx, _ty);
 #endif
 
 }
diff --git a/khtml/rendering/render_flow.cpp b/khtml/rendering/render_flow.cpp
index ae579bd46..6fda24bb4 100644
--- a/khtml/rendering/render_flow.cpp
+++ b/khtml/rendering/render_flow.cpp
@@ -358,6 +358,9 @@ int RenderFlow::rightmostPosition(bool includeOverflowInterior, bool includeSelf
         relativePositionOffset(right, y);
     }
 
+#ifdef DEBUG_LAYOUT
+    kdDebug(6040) << renderName() << "(RenderFlow)::rightmostPosition(" << includeOverflowInterior << "," << includeSelf << ") Rightmost position: " << right << endl;
+#endif
     return right;
 }
 
diff --git a/khtml/rendering/render_line.h b/khtml/rendering/render_line.h
index d42f2acb8..972a57830 100644
--- a/khtml/rendering/render_line.h
+++ b/khtml/rendering/render_line.h
@@ -84,7 +84,15 @@ public:
 
     RootInlineBox* root();
 
-    void setWidth(short w) { m_width = w; }
+    void setWidth(short w) {
+        if (w < 0) {
+            m_width = SHRT_MAX;
+            kdDebug( 6040 ) << " InlineBox::setWidth() invalid negative width " << w << " specified!" << endl;
+        }
+        else {
+            m_width = w;
+        }
+    }
     short width() const { return m_width; }
 
     void setXPos(short x) { m_x = x; }
diff --git a/khtml/rendering/render_object.h b/khtml/rendering/render_object.h
index f7f772387..a88385c29 100644
--- a/khtml/rendering/render_object.h
+++ b/khtml/rendering/render_object.h
@@ -334,10 +334,8 @@ public:
 	m_minMaxKnown = b;
 	if ( !b ) {
 	    RenderObject *o = this;
-	    RenderObject *root = this;
 	    while( o ) { // ### && !o->m_recalcMinMax ) {
 		o->m_recalcMinMax = true;
-		root = o;
 		o = o->m_parent;
 	    }
 	}
diff --git a/khtml/rendering/render_text.cpp b/khtml/rendering/render_text.cpp
index f5fa2e373..cd8f39d8c 100644
--- a/khtml/rendering/render_text.cpp
+++ b/khtml/rendering/render_text.cpp
@@ -23,8 +23,8 @@
  *
  */
 
-//#define DEBUG_LAYOUT
-//#define BIDI_DEBUG
+// #define DEBUG_LAYOUT
+// #define BIDI_DEBUG
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -295,7 +295,7 @@ void InlineTextBox::paintDecoration( TQPainter *pt, const Font *f, int _tx, int
         pt->setPen(linethrough);
         f->drawDecoration(pt, _tx, _ty, baseline(), width, height(), Font::LINE_THROUGH);
     }
-    // NO! Do NOT add BLINK! It is the most annouing feature of Netscape, and IE has a reason not to
+    // NO! Do NOT add BLINK! It is the most annoying feature of Netscape, and IE has a reason not to
     // support it. Lars
 }
 
@@ -1305,7 +1305,9 @@ unsigned int RenderText::width(unsigned int from, unsigned int len, const Font *
 
     int w = f->width(str->s, str->l, from, len );
 
-    //kdDebug( 6040 ) << "RenderText::width(" << from << ", " << len << ") = " << w << endl;
+#ifdef DEBUG_LAYOUT
+    kdDebug( 6040 ) << "RenderText::width(" << from << ", " << len << ") = " << w << endl;
+#endif
     return w;
 }
 
@@ -1315,16 +1317,19 @@ short RenderText::width() const
     int minx = 100000000;
     int maxx = 0;
     // slooow
-    for(unsigned int si = 0; si < m_lines.count(); si++) {
+    for (unsigned int si = 0; si < m_lines.count(); si++) {
         InlineTextBox* s = m_lines[si];
-        if(s->m_x < minx)
+        if (s->m_x < minx)
             minx = s->m_x;
-        if(s->m_x + s->m_width > maxx)
+        if (s->m_x + s->m_width > maxx)
             maxx = s->m_x + s->m_width;
     }
 
     w = kMax(0, maxx-minx);
 
+#ifdef DEBUG_LAYOUT
+    kdDebug( 6040 ) << "RenderText::width() = " << w << endl;
+#endif
     return w;
 }
 
@@ -1486,7 +1491,7 @@ static TQString quoteAndEscapeNonPrintables(const TQString &s)
 
 static void writeTextRun(TQTextStream &ts, const RenderText &o, const InlineTextBox &run)
 {
-    ts << "text run at (" << run.m_x << "," << run.m_y << ") width " << run.m_width << ": "
+    ts << "text run at (" << run.m_x << "," << run.m_y << ") width " << run.width() << ": "
        << quoteAndEscapeNonPrintables(o.data().string().mid(run.m_start, run.m_len));
 }
 
diff --git a/khtml/rendering/render_text.h b/khtml/rendering/render_text.h
index 50132fbc7..ccd207b9d 100644
--- a/khtml/rendering/render_text.h
+++ b/khtml/rendering/render_text.h
@@ -74,7 +74,15 @@ private:
     void* operator new(size_t sz) throw();
 
 public:
-    void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; }
+    void setSpaceAdd(int add) {
+        if (add < 0) {
+            m_toAdd = 0;
+            kdDebug( 6040 ) << " InlineTextBox::setSpaceAdd() invalid negative value " << add << " specified!" << endl;
+        }
+        else {
+            m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd;
+        }
+ }
     int spaceAdd() { return m_toAdd; }
 
     virtual bool isInlineTextBox() const { return true; }
diff --git a/khtml/xml/dom_docimpl.cpp b/khtml/xml/dom_docimpl.cpp
index 922714a4e..ee039b1b2 100644
--- a/khtml/xml/dom_docimpl.cpp
+++ b/khtml/xml/dom_docimpl.cpp
@@ -2345,7 +2345,7 @@ bool DocumentImpl::isURLAllowed(const TQString& url) const
         return false;
 
     // Prohibit non-file URLs if we are asked to.
-    if (!thisPart || thisPart->onlyLocalReferences() && newURL.protocol() != "file" && newURL.protocol() != "data")
+    if (!thisPart || (thisPart->onlyLocalReferences() && (newURL.protocol() != "file") && (newURL.protocol() != "data")))
         return false;
 
     // do we allow this suburl ?
diff --git a/khtml/xml/dom_docimpl.h b/khtml/xml/dom_docimpl.h
index 5e50c09a4..b4b0058c9 100644
--- a/khtml/xml/dom_docimpl.h
+++ b/khtml/xml/dom_docimpl.h
@@ -27,6 +27,8 @@
 #ifndef _DOM_DocumentImpl_h_
 #define _DOM_DocumentImpl_h_
 
+#include <stdint.h>
+
 #include "xml/dom_elementimpl.h"
 #include "xml/dom_textimpl.h"
 #include "xml/dom2_traversalimpl.h"
@@ -617,7 +619,7 @@ protected:
                 TQString name = cs ? n.string() : n.string().upper();
                 TQString qn("aliases: " + (cs ? px.string() : px.string().upper()) + ":" + name);
                 if (!ids.find( qn )) {
-                    ids.insert( qn, (void*)id );
+                    ids.insert( qn, (void*)(intptr_t)id );
                 }
             }
             expandIfNeeded();