Xorg crash; Xlib errors

Reposting this with links, since the last one is stalled for
being too long.

Here are some issues I'm trying to resolve with the Gnash port.
Gnash is a shockwave flash player that is currently using
OpenGL, a GTK gui, the GTK GL extensions (gtkglext), and
pthreads.

Problem 1:

Something like 50% of the time, it hangs or fails to start,
giving Xlib errors such as:

Xlib: sequence lost (0x10000 > 0xb8) in reply type 0x1!

Here's the bug: https://savannah.gnu.org/bugs/?18062

This problem has only been reported on OpenBSD.

Problem 2:

When troubleshooting this, I found that one of the gtkglext
example programs crashes the X server.  I don't know whether or
not this is related to the gnash bug.

To try to reproduce it, make the x11/gtkglext port, cd into the
examples directory and make there, then run the pixmap example.

So, if anyone could help me out here, with either issue, it'd be
appreciated.

Here's a little more info on the X crash: I'm using an ATI
Radeon Mobility M7 LW on a T30 Thinkpad and it is 100%
reproducible here.  However, a friend could not reproduce it on
his T42 which, according to his dmesg, has the same card.

http://deanna.freeshell.org/dmesg.boot
http://deanna.freeshell.org/Xorg.0.log.old

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This GDB was configured as "i386-unknown-openbsd4.0"...
Core was generated by `Xorg'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libz.so.4.1...done.
Loaded symbols for /usr/lib/libz.so.4.1
Reading symbols from /usr/lib/libm.so.2.3...done.
Loaded symbols for /usr/lib/libm.so.2.3
Reading symbols from /usr/lib/libusbhid.so.3.0...done.
Loaded symbols for /usr/lib/libusbhid.so.3.0
Reading symbols from /usr/X11R6/lib/libXau.so.9.0...done.
Loaded symbols for /usr/X11R6/lib/libXau.so.9.0
Reading symbols from /usr/X11R6/lib/libXdmcp.so.9.0...done.
Loaded symbols for /usr/X11R6/lib/libXdmcp.so.9.0
Reading symbols from /usr/lib/libc.so.40.0...done.
Loaded symbols for /usr/lib/libc.so.40.0
Reading symbols from /usr/libexec/ld.so...done.
Loaded symbols for /usr/libexec/ld.so
Reading symbols from /usr/X11R6/lib/modules/fonts/libbitmap.so...done.
Loaded symbols for /usr/X11R6/lib/modules/fonts/libbitmap.so
Reading symbols from /usr/X11R6/lib/modules/libpcidata.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libpcidata.so
Reading symbols from /usr/X11R6/lib/modules/extensions/libdbe.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/libdbe.so
Reading symbols from /usr/X11R6/lib/modules/extensions/libextmod.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/libextmod.so
Reading symbols from /usr/X11R6/lib/modules/extensions/libglx.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/libglx.so
Reading symbols from /usr/X11R6/lib/modules/extensions/libGLcore.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/libGLcore.so
Reading symbols from /usr/X11R6/lib/modules/extensions/librecord.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/librecord.so
Reading symbols from /usr/X11R6/lib/modules/extensions/libxtrap.so...done.
Loaded symbols for /usr/X11R6/lib/modules/extensions/libxtrap.so
Reading symbols from /usr/X11R6/lib/modules/fonts/libfreetype.so...done.
Loaded symbols for /usr/X11R6/lib/modules/fonts/libfreetype.so
Reading symbols from /usr/X11R6/lib/modules/fonts/libtype1.so...done.
Loaded symbols for /usr/X11R6/lib/modules/fonts/libtype1.so
Reading symbols from /usr/X11R6/lib/modules/drivers/ati_drv.so...done.
Reading symbols from /usr/X11R6/lib/modules/input/mouse_drv.so...done.
Loaded symbols for /usr/X11R6/lib/modules/input/mouse_drv.so
Reading symbols from /usr/X11R6/lib/modules/input/kbd_drv.so...done.
Loaded symbols for /usr/X11R6/lib/modules/input/kbd_drv.so
Reading symbols from /usr/X11R6/lib/modules/drivers/radeon_drv.so...done.
Loaded symbols for /usr/X11R6/lib/modules/drivers/radeon_drv.so
Reading symbols from /usr/X11R6/lib/modules/libvgahw.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libvgahw.so
Reading symbols from /usr/X11R6/lib/modules/libint10.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libint10.so
Reading symbols from /usr/X11R6/lib/modules/libddc.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libddc.so
Reading symbols from /usr/X11R6/lib/modules/libi2c.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libi2c.so
Reading symbols from /usr/X11R6/lib/modules/libfb.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libfb.so
Reading symbols from /usr/X11R6/lib/modules/libramdac.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libramdac.so
Reading symbols from /usr/X11R6/lib/modules/libxaa.so...done.
Loaded symbols for /usr/X11R6/lib/modules/libxaa.so
Reading symbols from /usr/X11R6/lib/modules/multimedia/theatre_detect_drv.so...done.
Loaded symbols for /usr/X11R6/lib/modules/multimedia/theatre_detect_drv.so
#0  0x064bae58 in _mesa_make_current (newCtx=0x89411000, drawBuffer=0x8367f000, readBuffer=0x8367f000) at context.c:1562
1562             if (!newCtx->DrawBuffer || newCtx->DrawBuffer->Name == 0) {
(gdb) bt
#0  0x064bae58 in _mesa_make_current (newCtx=0x89411000, drawBuffer=0x8367f000, readBuffer=0x8367f000) at context.c:1562
#1  0x0665ea09 in XMesaMakeCurrent2 (c=0x89411000, drawBuffer=0x8367f000, readBuffer=0x8367f000) at xm_api.c:2088
#2  0x0665b4d6 in __MESA_makeCurrent (gc=0x89411000) at xf86glx.c:831
#3  0x0370a7bd in DoMakeCurrent (cl=0x7eee1980, drawId=8388641, readId=8388641, contextId=8388638, tag=0) at glxcmds.c:651
#4  0x0370a2b8 in __glXMakeCurrent (cl=0x7eee1980, pc=0x7f551014 "\217\005\004") at glxcmds.c:405
#5  0x037111ed in __glXDispatch (client=0x7f7cd000) at glxext.c:447
#6  0x1c08b9f5 in Dispatch () at dispatch.c:459
#7  0x1c0a2729 in main (argc=5, argv=0xcf7fa6a0, envp=0xcf7fa6b8) at main.c:450



pci bus 0x0001 cardnum 0x00 function 0x00: vendor 0x1002 device 0x4c57
 ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500]

PCI: 01:00:0: chip 1002,4c57 card 1014,0517 rev 00 class 03,00,00 hdr 00