Download Netbeans 6.5 RC2 now and try it out.
If you have been using 6.5 RC1, then you will need to redo all of your settings for RC2. However, the easiest way to get around this is to copy the contents of your Netbeans user directory from RC1 into RC2. If you do this then all of your settings will be retained.
Test RC2 and give feedback to the development team (email@example.com) if there are issues.