I am experiencing a very frustrating issue with my Macbook Pro in that the trackpad on the machine itself as well as my Magic Trackpad are intermittently unresponsive in various applications, when clicking/tapping in particular. Sometimes I can do click in one area of an application, but not another. Sometimes clicking in a responsive application, and then reclicking in the problematic application helps, but usually not for long. I am running Lion (10.7.1).

So far I have tried resetting the PRAM on my Macbook Pro with no sucess. Can anyone suggest anything else I can try?

Hoping that I can post this message by clicking on the 'Post Message' button!