Running a report on a domains positioning and noticed that it had been "wiped out" at AV.com, checked manually and it was still in the same position as before. When the mouse was rolled over the title this showed:
I've not seen anything like this. Looks like one of those browser addons to me. There are a couple of those browser search bar thingos that generate those types of hash id's. You don't run into a referral from them to often (no one is using them).