Msysgit and vim
The vim installation that comes with msysgit is missing a number of syntax file dependencies. In addition to what is installed by default, C:\Program Files\Git\share\vim\vim72\syntax should also contain diff.vim and nosyntax.vim. Without these vim will not display properly and will issue warnings that it’s unable to locate these files.
It looks like a fix has already been made (see this thread) but until it is released you can get these files directly from vim’s SVN repo: diff.vim and nosyntax.vim