This problem occur today, for some reasons I cannot commit POT files. Here is the exact error
Commit failed (details follow):
CHECKOUT of
'/!svn/ver/78719/wp-downloadmanager/tags/1.40/wp-downloadmanager.pot': Could
not read status line: connection was closed by server (http://svn.wp-plugins.org)
To bypass this error, I have to delete away the pot file, commit and then add the pot file and commit again.
Any ideas?