Mystery error message

Hi All

First post – which means I need lots of help.

I’ve just upgraded to ver2.2.

I have a static first page, defined as a home page, using the Rapid Niche Websites theme editor.

Since the upgrade, I get the following error message on the front page only:

“WordPress database error: [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]
SELECT cat_id, cat_name FROM…”

I’ve tried deactivating the category order plugin – did not help.
I’ve tried database repair – no help.
I’ve clicked on the “category order” arrow – nothing.

What’s left – a roll back to 2.1?

Thanks in anticipation

Darrell