OSXilla causing Mozilla failed launches?

I already reported that Mozilla builds later than 1.8a3 were failing 
to launch on my Mac (OS 10.3.7) with OSXilla installed. They do 
launch ok with profiles that don't include OSXilla.

The same behaviour arises with recent Mozilla build 1.8a6: it stalls 
just before launching is completed, after the main menu bar appears, 
but before any window comes up, persumably as OS Xilla is launching 
its components.

Any confirmation from other users?
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Michael Hinchliffe