It could be an account specific issue. Try setting up a test account & see if same issue;
Setting up a Test Account in OSX (click on link).
If same issue, might I suggest you try installing LW 4.16.
http://www.gnutellaforums.com/mac-os...tml#post271009.
Also try changing your Java version priority around:
Setting up Java 1.5; drag the first preference to the top of the list.
If you have not done it recently, I'd recommend a Safe Boot & Repair permissions:
SAFE Boot & Repair Permissions