Bug#407007: x11-common: random X crashes - miSetShape

[Calum Mackay <calum.mackay@cdmnet.org>]

excellent!, thanks much, Michel,

> Thanks. Are you using backing store? AFAICT that's the only situation
> where miSetShape calls miRegionDestroy. 

Yes indeed, I seem to have that turned on, and I am using the radeon driver.

> The current backing store
> implementation is known to be slow (see bug #245548) and buggy (#368063)
> and will likely only be fixed in the form of a complete rewrite based on
> the Composite layer. Don't use it.

Ironically, I have been suffering from 368063 myself, without knowing 
the bug number, and had given up all hope of tracking it down :)

I have disabled that option, and will monitor.

thanks again.

cheers,
c.