Tagging with keywords is not working, "sgkeyword" entered in database instead?!?

Hi Mike. I have some keywords pre-defined in the back-end Config screen. When I login and go to a picture I own, I can select one of these keywords to tag the photo; HOWEVER, the keyword I select is not entered in the database correctly. Instead of my selection, the text "sgkeyword" is entered instead. If I go back to the photo once I'm done tagging, it shows this "sgkeyword" as the tag. Any idea on what is causing this? The custom tags seem to be working fine, the problem is just with the pre-defined keywords. See link to example in Misc info box.