Netbeans and the „indexing project“ problem

I’m using netbeans 6.8 as a php-developer. Every month or so I have to delete the local cache because netbeans is indexing forever consuming 50-100% of CPU.

Now netbeans 6.9.1 was released. So I thought that this problem which appears through all users of netbeans should be solved. But I was wrong. It seems to be even worse. The indexing doesn’t stop even after deleting those file-cache. So I switched back to netbeans 6.8 and I’m hoping that this time the indexing will stop. currently it is still running 🙁