Version 0.3.9-beta is out. It should fix the previously introduced bug. It also includes some fixes for lexicon code.
Update: published 0.3.10-beta which hopefully _really_ fixes the bug with the recoverable error in the logs. Please let me know if it still exists, we than have to dig further into your systems as I cannot reproduce the bug in my dev environment right now. Sorry for the inconveniance of having so short timed update rounds (I always hate updating every day for bugfixes only).