We upgraded our NE server to 5.0.11 last night, and now all of our Thunderbird users who are using Lightning are noticing that Thunderbird occasionally hangs for up to a couple minutes at a time, as well as hanging for a minute or two when starting up.

This has been reported to me with the latest versions of both Thunderbird and Lightning ( and 0.9, respectively).

The slowdowns and hangs stop if we remove Lightning from the configuration.

Has anyone else noticed this? I'm not seeing anything obvious in mailbox.log.