Comment 40 for bug 993265

Unfortunately, bug 1019337 has not solved my problem (I have updated and even rebooted today).

However, when I run your trace commands, the nature of the problem changes; instead of the window decorations disappearing altogether, the close, minimise and maximise buttons did. And then I cannot cause it to crash.

Still having a problem with breakpoints:
Function "_XError" not defined.
So, I just answered "y" and that gave me a "bt" (attached).

So, I'm not sure that it will give you a true reflection: without running your trace, the window decorations disappear; whereas running your trace, only the close, minimise and maximise buttons disappear.