Found a neat function for gvim which automatically strips out bold font directives from syntax files since there's no way to globally disable bold. Bold really stinks on most small bitmap fonts; it is much better to use different colors for emphasis. Add this to .gvimrc:
function! Highlight_remove_attr(attr)
" save selection registers
new
silent! put
" get current highlight configuration
redir @x
silent! highlight
redir END
" open temp buffer
new
" paste in
silent! put x
" convert to vim syntax (from Mkcolorscheme.vim,
" http://vim.sourceforge.net/scripts/script.php?script_id=85)
" delete empty,"links" and "cleared" lines
silent! g/^$\| links \| cleared/d
" join any lines wrapped by the highlight command output
silent! %s/\n \+/ /
" remove the xxx's
silent! %s/ xxx / /
" add highlight commands
silent! %s/^/highlight /
" protect spaces in some font names
silent! %s/font=\(.*\)/font='\1'/
" substitute bold with "NONE"
execute 'silent! %s/' . a:attr . '\([\w,]*\)/NONE\1/geI'
" yank entire buffer
normal ggVG
" copy
silent! normal "xy
" run
execute @x
" remove temp buffer
bwipeout!
" restore selection registers
silent! normal ggVGy
bwipeout!
endfunction
autocmd BufNewFile,BufRead * call Highlight_remove_attr("bold")
Found here. Written by Steve Hall.