Fix unknown icon prefix message

am_edit

@@ -1552,19 +1552,25 @@ sub tag_ICON()
                'lo16' => 'locolor/16x16',
                'lo22' => 'locolor/22x22',
                'lo32' => 'locolor/32x32',
+               'lo48' => 'locolor/48x48',
+               'lo64' => 'locolor/64x64',
+               'lo128' => 'locolor/128x128',
+               'lo256' => 'locolor/256x256',
                'hi16' => 'hicolor/16x16',
                'hi22' => 'hicolor/22x22',
                'hi32' => 'hicolor/32x32',
                'hi48' => 'hicolor/48x48',
                'hi64' => 'hicolor/64x64',
                'hi128' => 'hicolor/128x128',
+               'hi256' => 'hicolor/256x256',
                'hisc' => 'hicolor/scalable',
- 	       'cr16' => 'crystalsvg/16x16',
+               'cr16' => 'crystalsvg/16x16',
                'cr22' => 'crystalsvg/22x22',
                'cr32' => 'crystalsvg/32x32',
                'cr48' => 'crystalsvg/48x48',
                'cr64' => 'crystalsvg/64x64',
                'cr128' => 'crystalsvg/128x128',
+               'cr256' => 'crystalsvg/256x256',
                'crsc' => 'crystalsvg/scalable'
               );