[TxMt] sticking keys?

The best way to describe my problem is it feels like my keys aren't working correctly. When I type, sometimes I have to push a key or space bar several times to have the character appear on the screen. The problem doesn't seem to have a logic— i.e. sometimes the space bar works and sometimes I need to press it several times.

I have only experienced this problem in textmate. I am using Textmate Version 1.5.1 (1070) I have experienced this problem in the markdown and plain text bundles. I have restarted the computer, but still have the problem.

Has anyone experienced this?

Thanks, Steve