SEVERE WARNING!

This is a nasty temporary hack – not even close a temporary solution. It might cause other issues and side effects so use only if You know what You are doing and backup your database and plugin code first of all. Apparently Gengo is not compatible with WordPress 2.7+ yet, so even if the fix works without causing any damage – it might still be a drop of water in an ocean.

The issue

When submitting a comment to the page (as opposed to the post) the following PHP warnings and SQL syntax error occur:

Warning: implode() [function.implode]: Bad arguments. in …./wp-content/plugins/gengo/gengo.php on line 1484

Warning: Cannot modify header information – headers already sent by (output started at …./wp-content/plugins/gengo/gengo.php:1484) in …./wp-includes/pluggable.php on line 850

The Fix

Edit gengo.php and go to line 1484. Put following code above implode statement, so it looks like this (including implode statement):

if (! is_array ($ids) )
{
$ids[0] = '1';
}
$language_ids = implode(",", $ids);