I know of one bug in abstractions, which is that a patch can't include itself as an abstraction; trying to do so crashes Pd. I have to install a check for this but haven't done so yet (trying to correct bigger problems first.)
Abstractionas are also awkward in another way, which is that they don't get updated when you save the file. So your running patch can have several different versions of the abstraction. What's more, when you close the patch Pd doesn't check for dirty abstractions. I'll fix that someday.
I don't know of any interactions between netreceive and abstractions; I'm curious about that.
Right now I'm working some more on the "data" stuff, not makeing much progress.
cheers Miller