XNA only seems to work with physical drives.  Mapping your working folder to a network drive results in content compiler errors.  It’s pretty dumb that content needs to be “compiled” in the first place, but it’s just another one of those awkward hacks to circumvent the lack of run-time performance of C#.  I keep hoping that M$ will just let developers work in a language that makes sense for performance critical software like, oh I don’t know, games?!?

Example: Mapping C:\MyCode to Z:\ will allow your code to compile, but your custom content pipelines will fail.  Bug? Probably…