I read that people were having MBox problems and I wonder if it's an exchange issue. My work email has happily run in Mail until I did the upgrade. Now it won't receive new mail, but actually will still send. I've deleted and re-set up the mailbox, but I think it's gone. The icon switches from the zig-zag heart beat look to the attention logo. I've been running mail with my exchange for a year or so and this is the first problem I've had. Any solution would be appreciated, looks like I'm using Thunderbird until the Exchange Support I read about in the launch is fixed. Thanks, in advance.