This is such good news. The problem is an annoyance, but I want it gone.
Has your approach permanently solved the problem, so far as you can tell?
I can't see the db editor in the RZR repo that I got via N9 Quick Tweaks. Can you provide a link or program name?
deb http://harmattan-dev.nokia.com/ free non-free
And you just deleted everything in the columns you described earlier?