>In addition to what Tracy said (which I've seen happen too) - if you have that task pane thingy open in VFP and have it setup to log you into the UT you'll see this issue too.

Not my case. I have it open only in IE. Read a message, then click on another message header to read and presto! I get the error. This happens every so often, as if the underlying tables were being worked on in exclusive mode or something.