Menu Bar Boot Up

Hi, I have a MBP 2.66 late 2008 model with 4gb of ram and lately ever since I bought the new magic mouse every so often my menu bar won't load properly. It loads like transparent then I have to move my mouse up to it for it to fill in the color. And last time the menu bar didn't even load up at all. I'm thinking it might be the bluetooth mouse menu icon because I removed it and it hasn't done it since. I put it back on today to see if it starts. But I'm having a lot of trouble with this mainly because it doesn't happen consistently. I happens then it doesn't. So if anybody knows about this issue and can help your info will be greatly appreciated.

Thanks

I had this problem in the past, without bluetooth mouse.
I resolved it by repairing permissions, and reinstalling my version of OS X.
It kept coming back intermittently for me with SL until I did the combo update to 10.6.2
I have no explanation for this.