Netbeans 6.5.1 issue after Java for MAC OS X 10.5 Update 4
Yes. That's what I found out. I did try a selective revert using Time Machine and tried restoring earlier versions of NB abd Java, but this only broke several other applications.
In the end, I did a complete Time Machine restore to a recent good configuration. Everything's working again - only I'm not going to update Java until I'm pretty sure the issue is solved.