You can clone with
HTTPS or Subversion.
will cause such a crash. The page crashing will not refresh the list (no commit happens), so even if the activity is no longer run, it will stay there, keeping the crash alive.
Fixed in bf3cc98
Still would be nice to get Django working with non-ascii, though - but that might mess up sauer location fields in the engine.
I've been toying around with Turbogears2 which has full unicode support by default. I'm thinking it'll be possible to translate the unicode to ascii when needed for the sauer engine. I'll keep you updated.