Slow and buggy in some cases Rated 1 out of 5 stars
nbar can cause your browser to hang when pasting an extremely long url, for example view: http://pastebin.com/raw.php?i=dz5vAsKN
The browser will hang for 1 or more minute when trying to edit values of that png data image.
Another frequent bug I witnessed was sometimes awesomebar entries would show up as "null" and stop working. It seems very random which searches it happens with but it happenes enough where it is too annoying. I didn't provide a screenshot but can if anyone is interested.