Jim, I prefer the way the old background looks. The board has been up a long time and if this the first complaint you've had I would say that is a great record. Perhaps if more people knew how to adjust their text size on their browsers? I believe DynamicDrive.com, whom I know you to be familiar with, has a script that allows viewers to adjust text size by clicking on a option link on the page itself. I will have to double check that. Anyway, I don't know how it would work within CGI.
My opinion is this. Leave things as are and maybe explain to folks how to change their text and other viewing options.