Following my recent adventures with Azureus, I found that Azureus was crashing on a regular basis and often not starting up at all. Running it from the command line gave me an error similar to the following:
An unexpected error has been detected by HotSpot Virtual Machine
and a lot of mumbo-jumbo following that.
This error has been reported all over the place, including at bugs.sun.com (who decided to close it.. thanks guys! :S). But no apparent solution was being provided anywhere. Azureus was definitely stable when running 1.4.2, although it wasn't exactly performing up to par. So, this was definitely a java compatibility problem.