If you can, tick the don't show again option box on tips of the day.
How much ram do you have?
When you said upgraded Java, did you mean via apple's softw update program. If yes, then may I suggest you use the 'Standalone' Java installer:
http://www.apple.com/downloads/macos...update142.html Installing over the net can cause issues. That's why standalone installers often fix issues. By standalone I mean the installer has everything inclusive. There's nothing xtra to obtain over the net.
Also see this:
http://www.gnutellaforums.com/showth...6094#post96094