After many repeated tests with multiple LIMIT sections in .htaccess (and without restarting apache2) i've managed to get a leak of part of config file:

  Allow: �E2�~,HEAD,,ex.html/,OPTIONS,POST,,HEAD,,HEAD,Pek�~,HEAD,,,ex.html/,GET,HEAD

Most certainly something is leaking:

  l-lbiegaj ~ -> curl -sI -X OPTIONS http://mysite/ | grep ^Allow
  Allow: allow,HEAD,GET,HEAD,POST,OPTIONS

Value returned in 'Allow' changes with every apache2 restart, but I haven't yet seen any parts of the config or something other than extraneous commans or 'allow' string.