Untranslatable correctly msg string
There is no way to made a correct translation into Russian (with plural forms) of pair on:
#: ../src/tooltips.py:213
#, python-format
#, fuzzy
msgid "Gajim - one unread message"
msgid_plural "Gajim - %d unread messages
because of some language features.
Possible solution is to change this strings to form:
msgid "Gajim - %d unread message"
msgid_plural "Gajim - %d unread message"