Vimrc for reference with bugs in peekaboo plugin

.vimrc

""" Settings for vundle following
set nocompatible
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'gmarik/Vundle.vim'

Plugin 'junegunn/vim-peekaboo'

call vundle#end()             " required
filetype plugin indent on     " required
""" End settings for Vundle

syntax on
set autoindent
set backspace=2
set encoding=utf-8
set expandtab
set hlsearch
set ignorecase
set laststatus=2
set laststatus=2
set modelines=0
set number
set shiftwidth=2
set showcmd
set showmatch
set smartcase
set softtabstop=2
set tabstop=2
set textwidth=0
set ttyfast
set wildmenu
set wildmode=list:longest
set wrapmargin=0


" function to execute current buffer using it's shebang
au BufEnter *
      \ if match (getline(1) , '^\#!') == 0 |
      \ execute("let b:interpreter = getline(1)[2:]") |
      \ endif

fun! CallInterpreter()
  if exists("b:interpreter")
    exec("! ".b:interpreter." %")
  endif
endfun

map <leader>x :call CallInterpreter()<CR>