WRAPUP 6-Facebook market makers' losses total at least $100 mln

* "Thousands" of Fidelity customers affected-source * Knight damages claims exceed Nasdaq pool * Facebook shares up slightly, Nasdaq stock falls By Jessica Toonkel and John McCrank May 24 (Reuters) - Claims by four of Wall Street's main market makers against Nasdaq over Facebook's botched IPO are likely to exceed $100 million, as they and other traders continue to deal with thousands of problems with customer orders. A technical glitch delayed the social networking compa