In the last two days, I have encountered an odd problem in VS2010 where the mouse can no longer be used to select a portion of code. Code selection with the mouse is generally done by putting the mouse on one side of the code, left clicking, then dragging across the code to be selected. That will just stop working. I can click, but when I drag, the code is not highlighted. In fact, nothing happens. The only solution I have found to the problem is close VS and re-start.

Has anyone else seen this?