As said in the topic title, I'm running Mac OS 10.4.3 and Firefox 1.5 RC1. This problem first showed up with RC1, IIRC, so it's 99% likely that it's related to that. Here's what's going on:

I'll click the Firefox icon on the dock, and the program will boot, like, a white window frame will come up and immediately disappear, shutting down the program. However, it doesn't do this all the time. Usually by the third or fourth time launching the program the window will "hold," it'll finish launching, and I'll have no programs using the program until I quit and try to launch again.

Has this problem been reported? Any idea what could be causing the problem?

Thanks!