I must say, this is really awkward to use, and the popup box dosn’t help too much. How about a regular browser window, with table widths that scale (as the current popup does). The vertical scrollbar provided by my browser should be sufficient to take care of my scrolling needs 
Other than that, glad to see a modern, full-featured forum system! (returns to usual lurking mode)
But it would be nice if it stretched to fit the browser window instead of a fixed width. Forum software seems good as well, and a proper set of code tags now ;D