Same problem here.  It may be a coincidence but since being locked into seller hub everything is either sooo slow or drops out/loops forever.  Been happening for 3-4 days.  Tried all the usual tricks (clear cashe, reset modem yada yada) but no improvement. Rang eBay today who stated that no reported issues but would log my problem.  If you are experiencing similar PLEASE ring eBay otherwise they will not know the extent of the problem.  OR are we all with the same ISP (I hear Optius cable is having issues also at the mo)