No problem for now from 8.0.1483 to 1489, via GUI, on Win XP Home SP3.
WebRep is not activated on my system, as I still don't see the use for it.
Its only purpose is to flag potentially dangerous websites based on avast!'s users reviews. Nothing else...
(It's a bit like trying to compare a Force Field -avast! main core- to a sticky note with a written warning on it

)
But thanks avast! Team anyway!