New in VIM7 is file type detection. To get info whether it is present/activated try that:
and that to turn it off:
File types are made to allow bulk customization for particular file type. At moment it doesn't provide any advantages over plain
:au - but probably more to come in future.
:filetype off must be at top of
.vimrc - it tries to manage everything so many options changed before would be reset.
P.P.S. Relevant help pages/see also:
:help 'filetype' and