Maybe this isn't the correct forum...I'm a newbie. Today, after checking and installing upgrades to my iMac OS X, I'm seeing a pop-up saying 'my existing messages need to be upgraded the first time I use Mail again." I'm not sure what it intends to do to my Mail messages and I'm slightly fearful because many of them are Outlook Express messages that were transferred from my old PC. Anyone gone ahead and done this 'mail upgrade' yet? and did you have any issues? -Rivergull