I'm using firefox and gnash on ppc.
If I browse the web, X.org segfaults very often, especially if I use the scroll-point (mac g5) of the mouse (maybe only above some flash content).
How to repeat:
E.g. surf www.spiegel.de, navigate and use the mouse' scroll function very often.

Xorg.0.log backtrace:
---------------------
Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x94) [0x1008aae4]
1: [0x100374]
2: [0x1ddfae48]
3: [0x1ddfae48]
4: /usr/lib/xorg/modules/extensions//libGLcore.so(xmesa_resize_buffers+0x64) [0x
f618404]
5: /usr/lib/xorg/modules/extensions//libGLcore.so(XMesaResizeBuffers+0x60) [0xf6
13d40]
6: /usr/lib/xorg/modules/extensions//libGLcore.so [0xf6130b8]
7: /usr/lib/xorg/modules/extensions//libglx.so [0xf9aa918]
8: /usr/bin/Xorg(ResizeChildrenWinSize+0x1fc) [0x1002d3ec]
9: /usr/bin/Xorg(miSlideAndSizeWindow+0x178) [0x100ff9b8]
10: /usr/bin/Xorg(ConfigureWindow+0x820) [0x1002cd00]
11: /usr/bin/Xorg(ProcConfigureWindow+0xc8) [0x10042a48]
12: /usr/bin/Xorg [0x1011d2bc]
13: /usr/bin/Xorg(Dispatch+0x230) [0x100434b0]
14: /usr/bin/Xorg(main+0x47c) [0x1002558c]
15: /lib/power4/libc.so.6 [0xfb63f70]
16: /lib/power4/libc.so.6 [0xfb641cc]

Fatal server error:
Caught signal 11.  Server aborting