Bug 189461 (fbmmx)

Description of problem:
X crashes after login as user. I have this happening on two computers with
different graphic cards, both are AMD though. I think it might be related to a
transparent gnome-panel. It works when i switch to a text console during login
and then switch to x11.

Version-Release number of selected component (if applicable):
fc5 with updates

How reproducible:
login on my machine, but it does work sometimes.

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
here is an excerpt of my Xorg log:

Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x87) [0x80b86c7]
1: [0x8c2420]
2: /usr/lib/xorg/modules/libfb.so(fbCopyAreammx+0x1e2) [0x152442]
3: /usr/lib/xorg/modules/libfb.so(fbCompositeCopyAreammx+0x66) [0x152566]
4: /usr/lib/xorg/modules/libfb.so(fbComposite+0x57b) [0x14316b]
5: /usr/lib/xorg/modules/libxaa.so(XAAComposite+0x261) [0x190261]
6: /usr/bin/Xorg [0x81543e6]
7: /usr/bin/Xorg(CompositePicture+0xf7) [0x8142007]
8: /usr/bin/Xorg [0x8147d6c]
9: /usr/bin/Xorg [0x81450a5]
10: /usr/bin/Xorg(Dispatch+0x19b) [0x80888eb]
11: /usr/bin/Xorg(main+0x487) [0x80701d7]
12: /lib/libc.so.6(__libc_start_main+0xdc) [0x8f57e4]
13: /usr/bin/Xorg(FontFileCompleteXLFD+0xb1) [0x806f511]

Fatal server error:
Caught signal 11.  Server aborting