Server-side python ImportError on pushing to repository

Happened twice tonight, same error message both times:

sam@[redacted] personal/2012/courses/cu-tsp/Code/TSP/output [master] > git p
{{{
#!python
Counting objects: 11, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 549 bytes, done.
Total 6 (delta 5), reused 0 (delta 0)
remote: Traceback (most recent call last):
remote: File "/opt/python/domains/bitbucket.org/current/bitbucket/scripts/git/hooks/pre-receive", line 9, in <module>
remote: from bitbucket.apps.repo2.hooks import prehooks
remote: ImportError: No module named bitbucket.apps.repo2.hooks
To git@bitbucket.org:markusschanta/cu-tsp.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@bitbucket.org:markusschanta/cu-tsp.git'
}}}

Hope this helps!