I've noticed it will upload old messages that have either been deleted or marked as read. This morning I opened my email at work and there were no emails in my box either new or old. Then all of a sudden it started to load them again, about 15,000 emails and it has done this on my iPhone as well, not as many but same symptoms. Not liking mobileme. I've had .mac for over 5 years now and if this continues, I may not anty up another year.