Nzbdrone crashing hard on Debian 7

I have a fresh install of debian 7, mono 3.2.8 and the latest devel-version of nzbdrone installed. Invariably, efter it running for anywhere between 5 and 40 minutes, nzbdrone crashes and nothing short of a reboot of the machine will get it back.

The web interface stops responding, it seems to just “stop”. Evedrything else on the machine continues to function normally. If I have pending downloads in sabnzbd they’ll complete just fine.

I’m linking to the logfiles for my run last night. I rebooted the machine, started up nzbdrone and let it do its thing. After about 40 minutes it dies.

http://almstrom.org/logfiles.zip

Clicking that link results in: This webpage is not available