PHP warnings with OG List manager code

While these warnings are a part of PHP 5 usage most likely, it would be good to get these warnings removed.

Note I changed the directory name to /www/w/

* warning: Invalid argument supplied for foreach() in /www/w/htdocs/modules/node.module on line 359.
* warning: implode() [function.implode]: Bad arguments. in /www/w/htdocs/modules/node.module on line 363.
* user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 query: SELECT DISTINCT(n.nid), n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.moderate, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM node n INNER JOIN users u ON u.uid = n.uid INNER JOIN node_revisions r ON r.vid = n.vid WHERE in /www/w/htdocs/includes/database.mysql.inc on line 120.
* warning: implode() [function.implode]: Bad arguments. in /home/killes/contributions/og2list/contrib/og2list_ads/og2list_ads.module on line 96.
* user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND is_active >= 1' at line 1 query: SELECT COUNT(*) AS count FROM og_uid WHERE mail_type IN (1,7) AND nid IN () AND is_active >= 1 in /www/w/htdocs/includes/database.mysql.inc on line 120.