[bachmeier]

You know what else they could do? They could disable a feature that deletes large volumes of email the user doesn't intend to delete.

[mattl]

I don’t remember the last time I deleted an email. I’ve marked things as spam, archived things but not deleted in a long while.

[tssva]

I delete email everyday.

[Tepix]

Sometimes you want to delete a whole bunch of mails, don't you?

[bachmeier]

I've updated my comment for clarity. The bug (which I've never encountered in more than 20 years as a Thunderbird user) is that users move messages to a local email folder, but the messages are deleted from the server without actually downloading them. At a minimum they should disable that operation. The guy that originally reported it worked at Sun and lost hundreds of work messages as a result of this bug. AFAICT the user wouldn't be affected if they did a copy of the messages and then manually deleted them from the server folder after confirming the copy was successful.