Anyone else have this issue with the 1440?

About a year after purchasing the 1440, I find the keyboard input is wonkey.  While typing, the cursor will suddenly jump to a different line, or the enter key will fire off, or suddenly the keyboard will cutnpaste or delete whole sections of what I am working on.  This happens with a variety of programs, from Word to IE, to Firefox, etc, so its definitely an issue with the keyboard itself.  All drivers are updated, fully patched, etc. 

Here's the caveat... when my girlfriend uses the laptop (she has tiny hands and a very light touch), she doesn't have any issues.  So its my ham fingers and heavy touch I suppose, to some extent.

Any ideas?  These problems make it very difficult to use this laptop as a writing device.  I wonder if there are any settings to alter the sensitivity of the keyboard?