This behaviour is terribly inreproducable..Sometimes it tends to not have any plan of what I'm typing, but mostly (and quite only) it actually knows what I want to have in my completion list.. If you're able to figure out a good way of having it that buggy, please tell me.
In the mean time, if you want to switch to older versions, just check out
http://mono-d.alexanderbothe.com/repo
