Eyeguy, I have been having exactly the same problems for months with my G10 and FIX Fisheye setup and was going NUTZ trying to figure out why. Finally talked it out with some diving/photog friends last week, switched to macro and got some focused shots from my fisheye port. The really annoying part was that the professionals were no help whatsover. Two things make me feel better about this. 1) that I finally have it resolved and 2) that I did not fly all the way to Cozumel to have such poor results.
I am so sorry that you had the same problem. Let's hope we both get the results we expect from now on!