I have refined a lot on this server. I always use the 50 attribute increase / 50% refine increase epithet, along with the 15% increase on the elite assassin deco. At some point in the last week there has been a drastic decrease in the refine success rate for clothing and weapons. Previously my refining of a 5 piece set of clothing to +5 had 2 or 3 fails at +5 and occasionally a single fail at +4. As of yesterday I have done 2 sets and on each set had 6 - 10 fails at +4 and 18 - 22 fails at +5.