Your comments

This is a needed feature. We were able to do it with the older version of the site but now its no longer possible to fiter Unassigned bugs.

We have someone who reports the bugs, then someone else assigns them to the right person.

It's very useful for us to see only unassigned bugs when needed, just like we can filter them by person.
Suggestion works, thats what we've been using so far.

Thanks,
Thanks for the followup!

Will check it out.
That would be very usefull as we have lots of requests from our customers that are improvements, not bugs.