Airline does not display correctly unless I source _vimrc

Question

I have airline plugin installed with pathogen.

It displays <bf><bf> etc instead of showing normal characters. If I source my _vimrc, airline displays everything normally. I sometimes have to source twice. It used to work with no problems but recently I uninstalled Vim then installed a 64bit version (unofficial) and then uninstalled the latter and reinstalled vim74 32bit version (windows).

Here is my _vimrc:

set nocompatible
set maxcombine=6  
set autochdir
set backspace=2
set encoding=utf-8
set guifont=Hack:h9
set shiftwidth=3
set smartcase
set autoindent
set cindent
set smartindent 
set number numberwidth=4 relativenumber
set noerrorbells
set hlsearch
set hidden
set nobackup
set history=1000
set noswapfile
set guioptions-=T
set guitablabel=%t
set laststatus=2
set tabstop=3
set background=light


hi Search guifg=red guibg=yellow 

execute pathogen#infect()

syntax on
filetype on
filetype plugin on
filetype indent on

colorscheme solarized 

let g:solarized_italic=0
let g:solarized_bold=0
let g:solarized_contrast="normal"

let g:airline_powerline_font=1
if !exists('g:airline_symbols')
    let g:airline_symbols = {}
endif

 "airline symbols
let g:airline_left_sep = ''
let g:airline_left_alt_sep = ''
let g:airline_right_sep = ''
let g:airline_right_alt_sep = ''
let g:airline_symbols.branch = ''
let g:airline_symbols.readonly = ''
let g:airline_symbols.linenr = ''


autocmd BufNewFile,BufReadPost *.c,*.cpp,*.h,*.cxx,*.hpp,*.C,*.cc,*.cp,*.H,*.hxx set filetype=cpp nowrap
autocmd BufNewFile,BufReadPost *.java set filetype=java nowrap
autocmd BufNewFile,BufReadPost *.html,*.html,*.htm5,*.html5 set filetype=html nowrap
autocmd BufNewFile,BufReadPost *.mysql,*.sql  set filetype=mysql nowrap

inoremap <c-u> <esc>viwU<esc>i
nnoremap - ddp
nnoremap <leader>ev :edit $MYVIMRC<cr>
nnoremap <leader>sv :source $MYVIMRC<cr>
nnoremap <leader>p "+p
nnoremap <leader>sd :nohl<cr>:nohl<cr>
nnoremap <leader>u kA<cr>
nnoremap <leader>[ <c-w>W
nnoremap <leader>] <c-w>w

I'm using the following plugins with pathogen:

• autocomplpop
• nerdtree
• nerdcommenter
• vim-airline
• vim-airline-themes
• vim-colors-solarized

For better understanding my problem, here are some screenshots:

Before sourcing _vimrc:

After sourcing _vimrc:

New stuff: An extremely weird thing:

moving colorscheme solarized below let g: etc makes sourcing _vimrc once enough to display airline correctly. Before that I used to source twice.

Answer 1

I fixed the problem.

Add this to your _vimrc

scriptencoding utf-8