[Bug 12307] New: firefox 3 beta 4 crash on some web pages

http://bugs.winehq.org/show_bug.cgi?id=12307

Summary: firefox 3 beta 4 crash on some web pages
           Product: Wine
           Version: CVS/GIT
          Platform: Other
        OS/Version: other
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: winex11.drv
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

This happened three times in a row with http://heise.de,
but of course doesn't happen anymore.
The only symptom was a hang halfway through loading,
plus a backtrace:

Unhandled exception: page fault on read access to 0x066d1140 in 32-bit code
(0x7e2901e1).
Backtrace:
=>1 0x7e2901e1 X11DRV_XRender_ExtTextOut+0x551(physDev=0x1a7e28, x=0x1b,
y=0x95, flags=0x2010, lprect=0x34c4d0, wstr=0x34cdf8, count=0xc, lpDx=0x140110)
[dlls/winex11.drv/xrender.c:1306] in winex11 (0x0034c238)
  2 0x7e27683d X11DRV_ExtTextOut+0x5d(physDev=0x1a7e28, x=0x1b, y=0x95,
flags=0x2010, lprect=0x34c4d0, wstr=0x34cdf8, count=0xc, lpDx=0x140110)
[dlls/winex11.drv/text.c:55] in winex11 (0x0034c2f8)
  3 0x7e9545b2 ExtTextOutW+0xac2(hdc=0xee18, x=0x1b, y=0x95, flags=0x2010,
lprect=0x0, str=0x34cdf8, count=0xc, lpDx=0x34c5f8) [dlls/gdi32/font.c:1950] in
gdi32 (0x0034c518)
  4 0x6067f38b in xul (+0x1cf38b) (0x0034d038)

0x7e2901e1 X11DRV_XRender_ExtTextOut+0x551
[/home/dank/wine-git/dlls/winex11.drv/xrender.c:1306] in winex11: movswl    
0x8(%eax),%edi
1306                current.x += (elts[idx].xOff +
formatEntry->gis[wstr[idx]].xOff);