Hangups in JDKSE

Java applications Protege, NetBeans4.0, and two of my own generate a system hangup at random under upgrades to JDKSE 1.4 and 1.5 on my Windows 2000, SP4.To which knowledgable entity at Sun or others can I address this problem?
[240 byte] By [RenoRed] at [2007-11-25 18:57:29]
# 1

I've notified someone on the Java team. Can you provide any more details? Is the issue you report the same one mentioned on this thread:

http://forum.java.sun.com/thread.jspa?threadID=481634&tstart=0

This forum is actually for Java Desktop system, an alternative desktop operating environment. You could try reposting on one of the forums specific to development in the Java Language:

http://swforum.sun.com/jive/category.jspa?categoryID=11

b.nitz at 2007-7-3 22:36:09 > top of Java-index,Desktop,Sun Java Desktop System...