Azureus doesn't work with Java 6 Update 1 (with solution!)  Private: (?) 
No  
(Running XP Pro) I downloaded the newest Java update yesterday, (Java
Environment 6 Update 1), and all of a sudden Azureus won't open. It loads,
displays the main window for a milisecond, then immediately quits. No error
messages, nothing. Updating to the newest version of Azureus solves
nothing. However, everything IS solved by going to Add/Remove Programs and
removing the latest Java update. Assuming this wasn't the first time you
ever installed Java, it should just roll back to the previous update and
everything should work fine. After removing Java 6-1, I also clicked the
"change" button next to Java 5-10, and just clicked next until it finished
(so basically changed nothing - I don't know if this mattered because I
didn't try it the other way.) Hope this helps some people.

Please refer to this url for incident detail
http://sourceforge.net/tracker/index.php?func=detail&aid=1708343&group_id=84122&atid=575154