I was trying to change the directory structure of my repository, as detailed in this question (following the accepted answer). Things seemed fine after moving the directory, though it didn't recognise the files in their new location, and I got frustrated and just re-added everything. Now every file that I try to git-add comes back as 'fatal: pathspec FILE did not match any files'.
I honestly don't know how to diagnose the problem, and I don't want to blunder forward and screw things up even further. Any advice on how to proceed?
(git version 1.7.4.4 on OS X 10.8.2, if it's relevant)