There are some known bugs (Google for "edirol r-44 firmware bugs", not in quotes, and a few should show up) and I was told about three months back that a firmware upgrade would address them in about two months. I do hope in these troubled economic times that the guys who know how to do what needs to be done are still working for Edirol!
There are of course some wishlists - one has to be realistic in one's expectations, but showing the centre knob level numerically when moving it wouldn't seem to be a big ask (to allow one to be sure that it's bang in the middle for instance).