I have set my rules in Mail to send my mail to either an "archive inbox" or "archive sent" folder after 30 days. Every so often, I will realize that mail has unchecked one or both my rules in preferances without my knowlegde. I will re-check the rule box and it stays that way for a while then it automatically unchecks one of them again! (I also have to reset the "to mailbox:" each time in preferances). This is happening on both my iMac and Macbook Pro. I switched to Apple Mail just before upgrading to lion so I cannot say weather this is specifically a Lion issue. I was using Entourage before switching to Mail. This is just one of several quirky things I am experiencing with Mail. If it wasnt for the easy syncing with all my iOS devices, I'd switch back to Entourage. (I am using MobileMe, if it is a poblem with MM I cannot figure it out?) Thanks!