Thank you. As ':help showmatch' shows
Code:
'showmatch sm' boolean (default off)
global
there should be a way to disable parenthesis matching or any other delimiter matching. Do you know it? In my system sm is on.
EDIT: I found it. It's ':NoMatchParen'. There's more: by placing ':let loaded_matchparen=1' in /usr/share/vim/vimrc the plugin responsible for delimiter matching no longer loads! This thing was driving me crazy.