Dennis,
You are correct on both points. I wasn't trying to contridict or disagree with you, I was just re-pointing the thread back to the origional question, about the nose dropping. After your post, the thread didn't address the nose drop at all, everyone was talking about the trainer rolling out and dihedral. I still stand by my assertion that messing with the dihedral won't fix the nose dropping, and that the dihedral isn't causing the nose drop.

Personally, and this might just be me, I really don't find the rolling-out tendancy of trainers hard to deal with when inverted. In fact, I don't notice it at all. It's the nose dropping that is the biggest PITA for me. I can't say if it feels the same for a newbie though. I've flown enough very twitchy airplanes that staying on top of the trainer to keep the wings level is second nature. And Tuesday I had a (rather advanced) student trying inverted flight, and he also seemed to have no trouble with the roll, but the "full down" elevator was hard on him.

Ok, so maybe I will disagree with what the "biggest" problem is with flying a trainer inverted after all . Minor point though. Both the nose drop and the rolling tendancy make it a lot harder to fly a trainer inverted for any length of time compared to an intermediate sport plane, as was pointed out.