Xserver restarts when something is typed in search box

[brad]

Ubuntu 10.04 Beta
ThinkPad x31 Ati M6 Ly

My xserver is restarting approximately 90% consistently whenever I try to enter text in the firefox built-in search box.

The effect is the same as though I'd killed the xserver with Ctrl+Alt+Bkspc.

Specify any other relevant log-files and I'll upload them.

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e876b]
1: /usr/bin/X (0x8048000+0x61aad) [0x80a9aad]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0x110410]
3: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x5eb000+0xb20f9) [0x69d0f9]
4: /usr/lib/xorg/modules/libexa.so (0xcc5000+0x9490) [0xcce490]
5: /usr/lib/xorg/modules/libexa.so (0xcc5000+0x9558) [0xcce558]
6: /usr/bin/X (miCopyRegion+0x21b) [0x819abdb]
7: /usr/bin/X (miDoCopy+0x44d) [0x819b0fd]
8: /usr/lib/xorg/modules/libexa.so (0xcc5000+0x7a4a) [0xccca4a]
9: /usr/bin/X (0x8048000+0xd9d83) [0x8121d83]
10: /usr/bin/X (0x8048000+0x28db5) [0x8070db5]
11: /usr/bin/X (0x8048000+0x2a437) [0x8072437]
12: /usr/bin/X (0x8048000+0x1ed3a) [0x8066d3a]
13: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x294bd6]
14: /usr/bin/X (0x8048000+0x1e921) [0x8066921]
Segmentation fault at address (nil)

[Bryce Harrington (bryce)]

Are you able to reproduce this issue easily on lucid? If so, please collect a full backtrace - see http://wiki.ubuntu.com/X/Backtracing for directions.

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.