I don't know what causes this function to get called with a font that has a null mSizes, but its not capable of handling it properly. Breakpoint 2, PickASizeAndLoad (aSearch=0xbfff7888, aStretch=0x8270558, aCharSet=0x82701b0) at ../../../../mozilla/gfx/src/gtk/nsFontMetricsGTK.cpp:1314 1314 nsFontGTK* begin = aStretch->mSizes; 1: *aStretch = {mSizes = 0x0, mSizesAlloc = 0, mSizesCount = 0, mScalable = 0x8270570 "-ttf-verdana-medium-i-normal-italic-%d-*-*-*-p-*-iso8859-1", mScaledFonts = 0x0, mScaledFontsAlloc = 0, mScaledFontsCount = 0} This patch hides the problem, but does let a page load: =================================================================== RCS file: /cvsroot/mozilla/gfx/src/gtk/nsFontMetricsGTK.cpp,v retrieving revision 1.34 diff -r1.34 nsFontMetricsGTK.cpp 1314,1317c1314,1317 < nsFontGTK* begin = aStretch->mSizes; < nsFontGTK* end = &aStretch->mSizes[aStretch->mSizesCount]; < nsFontMetricsGTK* m = aSearch->mMetrics; < int desiredSize = m->mPixelSize; --- > nsFontGTK* begin; > nsFontGTK* end; > nsFontMetricsGTK* m; > int desiredSize; 1318a1319,1326 > if (!aStretch->mSizes) { > printf ("PackASizeAndLoad: Error, aSearch->mSizes is null\n"); > return; > } > begin = aStretch->mSizes; > end = &aStretch->mSizes[aStretch->mSizesCount]; > m = aSearch->mMetrics; > desiredSize = m->mPixelSize; After which I get this crash if I try to load any other page: Program received signal SIGSEGV, Segmentation fault. 0x400609d8 in nsWidget::GetParent (this=0x8245000) at ../../../../mozilla/widget/src/gtk/nsWidget.cpp:156 156 NS_ADDREF(mParent); (gdb) print mParent $1 = (nsIWidget *) 0x0

Reassign to erik@netscape.com

OK, I know what the problem is. But the tree is closed...

Checked a fix into nsFontMetricsGTK.cpp

Fixes the crash for me, but I know bruce is still wrestling with a number of font issues.