On third try after loading basic wpdiscuz on 2 different websites (with Media upload disabled) I get nearly the same error message on both, only my page ID where I created the comments is different.
So my update is that the problem is definitely repeatable. Ive used both Chrome and IE (and earlier FF) with same data base error results all the time.
Curiously enough (and again I dont know if related or not) but i am still unable to upload with the media upload program using any of these browsers. Additionally, with IE when I strike the media selection button there is no activity at all so im not even able to select any of the three types of files. I am able to select with the other two browsers, the comment appears to upload while the files don't seem to go anywhere.