{exp:query sql="SELECT c.entry_id, c.comment_date, COUNT(c.entry_id) AS comment_count, t.url_title AS url_titel, t.title FROM exp_comments c, exp_channel_titles t WHERE c.entry_id = t.entry_id AND UNIX_TIMESTAMP() - c.comment_date <= (114*24*60*60) GROUP BY c.entry_id ORDER BY comment_count DESC, c.comment_date DESC LIMIT 10"}

gets to



	{exp:query sql="SELECT c.entry_id, c.comment_date, COUNT(c.entry_id) AS comment_count, t.url_title AS url_titel, t.title FROM exp_comments c, exp_channel_titles t WHERE c.entry_id = t.entry_id AND UNIX_TIMESTAMP() - c.comment_date <= (114*24*60*60) GROUP BY c.entry_id ORDER BY comment_count DESC, c.comment_date DESC LIMIT 10"}

The problem is the "<" (<)