Since I updated to 10.5.2, I'm having some Mail issues, primarily with the "To Do" function. If I so much as click on a To Do, I get the spinning beach ball and ultimately have to force quit Mail. I have an Exchange Email account and .Mac account. Under "To Dos", there are two categories showing "On My Mac" and "Mac". The Exchange account does not show up under To Dos. Doing anything with any To Dos in either On My Mac or Mac, crashes mail. I use the To Dos a lot for work, primarily to track phone calls. I'm open to anything to fix this. I would even delete all the To Dos, reset it and start from scratch, but can't figure out how to do so, given that any interaction with any To Dos, simply crashes Mail. Help??