I looted 3 giant clams in Stranglethorn Vale and they had absolutely nothing.  I know these are always supposed to drop a blue pearl and clam meat yet every time I looted one, it simply opened without a loot interface and when I clicked on it again, it gave me an error stating something along the lines of, "That is already being looted."  Bug?
 
	And before you ask, my WDB folder is cleared.