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 (2.0.0.18 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.