Ah, well, Daz3D just changed the ad after I sent them an email (unless a GameDev staff changed it), so I guess that's resolved. Thanks anyway!
I don't normally bother doing that sort of thing, but I use GameDev.net dozens of times a day and couldn't get rid of the ad. And I didn't want to use an ad blocker either, and reduce revenue. Most GameDev.net ads are very well chosen - it's the only site I've ever actually clicked on ads from.