PT hangs on Get Mail

I'm using PT 1.5 on Windows and it's just started hanging on a Get Mail command.

It will usually download the first piece, then hang on the second one. It just started this behaviour recently, and I can't figure it out. The next eMail message isn't unusually large or an html message necessarily.

The only thing I can think of that I'm doing strangely is using PT on a Mac and on Windows accessing the same profile. The Mac version (also 1.5) seems to occasionally hang on program start.

Any thoughts? Thanks.