Not all errors are caught with Python, and the msgfmt check is
performed by `tx push`. In case of a failure, it stops with the
following obscure message:
{{{
Please run this command on your system to see the errors for yourself.
}}}
Which actually means `msgfmt -c` failed. See also the
[[http://help.transifex.com/intro/faq.html#what-should-i-do-when-my-file-has-syntax-errors| Transifex FAQ ]].
