This used to happen to one of my guildies and not just in Rag, but everywhere. The replay/OK screen would only come up if she loss the battle. It was that way for a while and then the problem went away. She uses Firefox and said that she did nothing to fix it. She actually was disappointed because she liked it when she did not have to click on OK when questing since you win all the battles (except the bosses, of course).