I have the same problem
LimeWire version 2.8.4 Pro memory allowed 202 Mo
Mac OS 9.2.2
Apple G4 850
StuffIt Expander™ 5.5
I had the same problem suddenly with LimeWire 2.7.13 Pro after weeks well running ...
I then decided to upgrade despite "screen bugs" on 2.8.4 ....
Very interested on answers