When its active it makes the page unresponsive when typing a post and you have ti kill it.
When its deactiavted the problem is gone?
Also when typing it lags and the text catches up like 4 seconds later. I understand others have the same problem.
I tried this on 2 different internet connections and same result.
If you fix this then you might have one of the best mods out there for vbulletin.
Everything works as advertised besides this, and this could kill it