Did you remember the bug about the the JVM crashing after running eclipse for a while? The problem seems to be due to a bug well into the JDK. Infact, I've installed Eclipse 3.4 RC4 on my brand new Windows Vista x64 installation and ... bang! Got it! So it is a really multi-platform bug for 64 bit platforms. And I can spare you a google search: it is not fixed yet (JDK 1.6.0_u6) but you may be willing to keep your eyes on it at SUN bugtracker.
