Trac source browser not working

I tried to follow a link to a commit on Trac today, and got an error: internal error (got unexpected object kind 'commit') The link I followed: http://hackage.haskell.org/trac/ghc/changeset/109a1e53287f50103e8a5b59227594... This was working before, has anything changed recently that would break it? I tried browsing to a couple of other commits and got the same error, so it doesn't seem specific to that commit. Cheers, Simon