This was working fine yesterday, and now... Not. Does anyone have any ideas?
Below is the log entry:

Time: 10/31/2007 7:38:53 AM
Error in Mail
There is an error synchronizing your mail account. Please verify your
account has been configured correctly by first accessing your mail on the web.
Error: 4102. Client. Cannot change immutable data: MessageClass.

Now I can access my mail fine on the web, and there have been no changes in
my web account since yesterday. I actually have not logged into my web
account for quite a while because the Connector has been working.