Comment # 6 on bug 74868 from Ilia Mirkin

(In reply to comment #5)
> Are there any other tools available or more limited
> valgrind traces I could run to track this down? I know wine stuff is tricky
> to work with.

apitrace -- records all OpenGL calls. If replaying a trace causes the same
leak, then you're all set. (You could also run valgrind on the trace replay.)