When I open 36 new tabs (on a full row) it hangs on tab 36 (tab-amount might be depended on the screen resolution, at his moment this is 1024x768)
I do use this amount of tabs regularly so it is important for me. K-Meleon 1.1.6 didn't have this problem (with layers).
Didn't test this in other Gecko browsers yet, but it wasn't a problem in Maxthon.
Forum:
Bugs