It could be an issue with WebMail accounts. I haven't tried that yet.
There could be a couple of things to try.
1. Could you provide the console log messages? May be that will give
me some clue. Here's how:
* Install Console² extension from
http://console2.mozdev.org/
* In Empty 'em Preferences, check the 'Enable console debug
messages'
checkbox
* Click OK
* Open Error Console (Tools -> Error Console)
* Clear the console by clicking on the 'Clear' button
* Make sure 'Messages' button is depressed
* Empty Junk & Trash (Tools -> Empty Junk & Trash)
* Console will now have many messages beginning with [Empty 'em].
Copy
all of them and paste into your reply
2. Create a new profile without the WebMail accounts, and try again.
If
it works, I can isolate the problem, to be related to WebMail
accounts.
In the meanwhile, I'll try to setup WebMail account and check for
myself.
Thanks for the report.
/Mahesh