I'm not sure if I know how to explain the problem. Mail just suddenly crapped out on me. When i start it up, it freezes and I get the spinning wheel of death. In the little dialog box it has frozen at a number of points. It will either say it is indexing messages, fetching them, or preparing to fetch them. Either way, the program simply freezes.
The last operation I did prior to this happening was my weekly carbon copy cloner backup this morning. So unfortunately, I don't have a pre-problem version to run. The problem happens whether I am online or offline.
I'm running 10.3.3 and have all the latest software updates.
Any suggestions?