One of the first things darcs does (for most commands) is that it 
searches from the CWD upwards to see whether we are somewhere inside a 
darcs repo. This is what I expect that to happen.

What I find surprising is that this also happens even if the directory 
we are in is not under darcs control. I propose we change that. That is, 
darcs should only recognize the fact that we are in a darcs repo if the
original working dir from which darcs was invoked is actually known to 
the the darcs repo (i.e. in recorded or pending).