moving messages to trash results in problems

I just moved a few messages to the trash folder and then switched to another contact, in order to clean up some more and I got an alert telling me that my session was logged out and that I need to log back in.

I then proceed by clicking on the "log me back in" link and I am back in my control panel.

This might be related to this one.

[EDIT]

this also affects the messages I moved to the trash. They get marked as "deleted" in the folder they were in (e.g.: strikethru, trash count gets updated), but once I click on trash, I get the exception and then the log-back-in-screen and when I return, the trash is empty and the messages have been placed back in their original folder.

[EDIT #2]

The workaround of leaving the site and then coming back also empties the trash and puts the messages back into their original folders.

[EDIT #3]

Oops: