(First, I'm not sure if this is in the right place--forgive me if it isn't!)

I'm having an issue with my Latitude XT's pen. When I write with it, it'll sometimes keep writing when I lift the pen from the surface of the screen.

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Where I wrote "writing" in green, I had no trouble. That little scribble to the right, though--whatever is circled in red, I had my pen off the screen and, as you can see, it kept writing. The program I was using is Windows Journal, on Windows 7 (64-bit). It has the same issue in MS Paint.

I had this trouble before, and I simply switched to another pen. But I don't have another other pen to switch to. Do you think that changing the pen nib might help? Or is there a setting I can change on the computer itself?

Has anyone else had an issue like this, and if so, how did you fix it?