if you context click on a going offline contact (red row) TB
it gives this
Traceback (most recent call last):
File "/home/nk/gajim/src/roster_window.py", line 157, in really_remove_user
self.draw_contact(user.jid, account)
File "/home/nk/gajim/src/roster_window.py", line 207, in draw_contact
users = self.contacts[account][jid]
KeyError: 'nkour@jabber.org.uk'
easy solution do not allow context menu for red and green [afterall it's just for some seconds]