vb link files for members/forums
$qs = explode('-', str_replace( '/member.php/', '', $_SERVER['QUERY_STRING'] ? $_SERVER['QUERY_STRING'] : $_SERVER['REQUEST_URI'] ) ); ipsRegistry::$request['u'] = $qs;
For members/forums, $qs winds up being u=102, for example, which then further down, causes it to fail the is_numeric check.
I just added
$qs = str_replace('u=','',$qs);
Between those two lines to strip it out.. Same with the forums redirect. Happens on the vb4.0 converters, I'd assume others as well.