Yes, the grease basically got too thick and hung up the pawls. I had this, and tried to get the freehub apart to re-lube with low-temp oil. In the end I couldn't get that freehub apart and switched to a different wheel with a hub that didn't give me problems. There is a a gadget out called a "freehub buddy?" that you use by pulling out the dust cap and replacing with it, then pumping light oil thru the freehub. It is usually necessary to replace the dust cap with a machined one by the same people.

Found a link
http://www.morningstartools.com/freehub_buddy1.html