An odd problem with the latest betas (3.4.0 Betas 2 + 3). Watching full screen flash video on one monitor whilst using FF4/5 for anything flash related(iPlayer, Youtube etc) causes the plugin to crash. Running flash on one site in a background tab then loading flash from another site in a foreground tab also causes the plugin to crash, sometimes the whole browser.

I'm running FF5(the problem is also there with FF4), latest Flash version 10.3.181.26, the problem is with 3.4.0 Beta 2 and 3. Reverting to 3.4.0 Beta 1 solves the problem.

It didn't even occur to me that it would be DisplayFusion at fault, I'm always ready to blame Flash (normally the right thing to do!). But after fiddling with FF and Flash versions I just happened to turn DF off and the problem went away. Thanks for the quick response Keith, good to see you're on the case