i had a 1995 gf aquila, which was very similiar to the tassajara, up until a few months ago when it was stolen. i don't know how the newer ones are, but i loved that bike. i'm sure the quality is still there on the new ones, though.
of course it didn't come stock with a shock back then-- i put a marzochi on it and it worked great. what kind of shock does it have? i know sometimes you can get a lemon with any product-- maybe getting it fixed will take care of it. if not, try to get it replaced, since only a couple of rides shouldn't blow any shock.