I'm using PostgreSQL
And yes, I've had to add checks like that to get to to work in at lease one more place.

I installed 0.4 yesterday, everything went very well.
http://ahmad.baitalmal.com

I'm having a tiny problem though, my post has the words

"Comments to this entry has been disabled by the author"

I kept unchecking and checking the "Allow comments to this entry" checkbox and resaving the entry ...