I am seeing the same exact thing that yaigor describes. Mine is a fresh 1.11 install and my server config is almost identical to his.
In the above example, I just clicking around trying to repeat it. In this instance, I clicked on My Tickets-->Assigned to Teams (0 tickets there btw)
It seems that it happens when you click on a link in the menu bar where there are 0/zero tickets.
I've seen cases where there were more than 10 pages showing up, yet 0 tickets. Can't repeat that right now.