Line 208, newpost.php:
(isset($config['markupoption']))
should be
( $config['markupoption'] == 1 )

The option is 1 or 0 in config.php.inc and the isset will therefore always be true.

Looks like I got confused on that one[]/testimages/icons/crazy.gif[/]. Thanks for the fix.

This fix also needs to be applied to newreply.php line 247.