gitlabhq/gitlabhq — pull request #1855 by sodabrew (2012-10-28 13:57:55+00:00)
Title: When the post-receive hook file fails the exists? test, suggest checking its permissions.

This seems to be a FAQ on the mailing list, try adding a short suggestion of what the user should do when their post-receive hooks are reported missing, yet the file exists. It's typically a permissions problem.