Since upgrading to B5160, I am having all sorts of problems with my keyboard. I am running on a 17" MacBook Pro OS 10.4.10 If I am connected to an external USB Keyboard, I have to enable the USB keyboard under Parallels and disable it on the Mac side before it becomes fully functional under Parallels. For example if I do not enable it under the USB devices menu, my TAB key will not function properly. If I am in a WP document and press the TAB key, the key focus jumps to the task bar and does not set a TAB in the document. Other times, I will hit a key on the keyboard and It performs a wierd Windows function like "Lock Computer" or Search. This is inconsistent but frequent. Very strange. It is as if I is reading a modifyier key along with the key that I press. I can live with this, reluctantly, when connected to an external keyboard because I can disable it on the mac side. The problem is when I am working away from my desk and only have the internal keyboard. There is no way that I can disable this on the Mac side as it makes the computer completely non functioning. I have to put up with very quirky keyboard functionality and the TAB key just does not work (and it is important to me). Help. This was not the case in the previous release. I am thinking I have to roll back.