[bug] Keyboard get locked in IntelliJ IDEA

Hello,

I'm experiencing a problem with my keyboard with IDEA. While working with idea, keyboard get locked up for no reason. After that, I can't type anything IN idea.(works perfectly in other apps.) I have to restart Idea to fix the problem. Mouse works fine, kb problem is only inside idea. This happens frequently, so it is a pain for me. I switched to idea 9.0.2 from 9.0.1 thinking it may had solved the problem. But apparently not.

Please give me a solution for this.

Im using Ubuntu 10.04 Ubuntu Lucid.

Thanks,

/kasun