I find that the state of Igor compatibility with cxoffice seems pretty much unchanged from over a year ago.
*The largest problem is the "data browser" which has graphical glitches. The selected wave does not update properly, and the wave displayed as selected does not always correspond with the "real" selected wave.
*Sometimes layouts are displayed as empty white windows. Mostly this seems to happen when I load a saved experiment with layouts.
*Minimized widows suffers from graphical glitches.
Maybe there is some other small problems, but those are the really painful ones I've found. I still have to resort to using vmware just to run Igor...
I've been in contact with Igor's developers (wavemetrics) and they seem very receptive to user input. They said they would like to cooperate with codeweavers to improve compatibility.