Agreed -- appears to be MySQL5-related.
Just taking a quick stab without testing:
/includes/classes/sel.url.php
around line 912:Try changing that to:Code:FROM ".TABLE_CATEGORIES." c, ".TABLE_CATEGORIES_DESCRIPTION." cd LEFT JOIN ".TABLE_CATEGORIES_DESCRIPTION." cd2Code:FROM ".TABLE_CATEGORIES_DESCRIPTION." cd, ".TABLE_CATEGORIES." c LEFT JOIN ".TABLE_CATEGORIES_DESCRIPTION." cd2



