check the webIDE queue, and you find a thread there where a phantom tag called "Build" shows up and which points to the universal profile of an employee (who is seen in Revisions; most likely did retagging).
If you open the thread, this tag is not visible any more
but from the "|" character one can see there "wanna be" something there. :)
I checked the page source to see what exactly is (or isn't there) and indeed nothing, but found another small thing that is most likely not intentional :
As if there was one extra doublequote (I don't say it is related to that phantom tag, the original issue I wanted to report is the tag problem ).