I wanted to share something that I observed recently on my own PC.  I am running Vista Home Premium, it came on my Alienware box.  I had some directories shared so I could hit them from some of my other PC’s, and the share names had underscores (_) in them.  Well, I recently installed Vista’s SP1 and afterwards, I noticed that my network shares were not working.  Hmm, that’s strange.  Skip ahead and what I found out was that after the SP1 install, my share names were renamed to the same thing, only without the underscore.  Well now, how about that?  So I had something like share_name, and then it became sharename without me changing it.  Not that big of a deal, but I thought I would share just in case anyone else was having the same troubles.