What's in your .vimrc file?
SlyShy: set nocompatibleset backspace=indent,eol,startif has("vms")
  set nobackup		
else
  set backup		
endif
set history=50		
set ruler		
set showcmd		
set incsearchmap Q gqinoremap <C-U> <C-G>u<C-U>if has('mouse')
  set mouse=a
endifif &t_Co > 2 || has("gui_running")
  syntax on
  set hlsearch
endifif has("autocmd")  filetype plugin indent on

  augroup vimrcEx
  au!

  autocmd FileType text setlocal textwidth=78

  autocmd BufReadPost *
    \ if line("'\"") > 1 && line("'\"") <= line("$") |
    \   exe "normal! g`\"" |
    \ endif

  augroup END

else  set autoindent	       

endifif !exists(":DiffOrig")
  command DiffOrig vert new | set bt=nofile | r # | 0d_ | diffthis
		  \ | wincmd p | diffthis
endifcolors zenburn:filetype plugin onset et
set sw=4
set smarttab
set lbrset t_Co=256set backupdir=./.backup,.,/tmp
set directory=.,./.backup,/tmpset nobackup
set nowritebackupset numbercompiler rubyautocmd Filetype ruby source ~/.vim/ruby-macros.vim
nnoremap <silent> <F8> :TlistToggle<CR>let Tlist_Auto_Open=1:set title titlestring=%<%f\ %([%{Tlist_Get_Tagname_By_Line()}]%)set virtualedit=all