On local development servers, it can happen that by default PHP strict standards warning are enabled.
These can cause warning messages to be printed an can cause problems with:
-- JS and JS Ajax code that is generated by PHP
To disable these, please edit
e.g. (if you have a xampp installation)
xampp/php/php.ini
and change the error reporting line from
e.g.
error_reporting = E_ALL
to
error_reporting = E_ALL & ~E_STRICT
NOTE: Remember to restart Apache server after ending the above file