Paying advertisements get frequency capped so that they don't keep showing to the same uninterested user time after time (since the advertiser pays when their ad is displayed regardless of whether it's clicked on).
When there are no more paying ads to display to you, you see those house ads. If you clear out your cookies, you'll start seeing those other ads for a little bit, and then it will inevitably default back to the defaults after you've browsed around a little .
MidiMagic, you're problem was also related to a flash ad, right? It appears to be a problem on the part of Macromedia or the particular advertiser in how their ad is designed. Unfortunately there's nothing I can do about it from my end.
That's why the ads that you do see (generally) aren't really ads ... they're things like "Relax in our Geek's Lounge"
Question: since house ads that say things like "chat up a storm on our IRC network" and such don't really earn you revenue, why not just show whitespace instead? It would definitely encourage people to visit DaniWeb more regularly. It doesn't really matter to me that much, since I'm using an ad blocker anyway, but it would be a cool feature for the regulars.
I don't see any ads on DaniWeb anymore which is why I have started participating again. AdBlocker Plus addon for Mozilla works great. The pages load much quicker and are 100% ad free. Sorry sponsors/advertisers, but you guys should make smaller and less obnoxious ads and there would be no need to have to block them. But nope, you think more colors and more movement will get your ad noticed.... wrong. It gets them blocked.
Kevin, the advertisers don't care :) They pay per time an ad is viewed regardless of whether it's clicked on. When their ads are blocked by people who wouldn't bother clicking on them, it saves them money that is spent on ad views by people who are more likely to click.
GIF and JPG ads unfortunately aren't capable of bringing in any revenue nowadays (or rather, a minimal amount). Certainly nothing to make even a dent in expenses.
Macromedia Flash is the standard for ads. And, unfortunately, there is a known bug with Flash and absolutely positioned layers ... Flash simply doesn't adhere to the CSS z-index property the way all other page elements do. The bug has existed and been known about for quite awhile now, and many sites have the same problem. It's just a matter of convincing IE and FF that the problem IS important enough for them to fix. I was really hoping that it would be fixed in IE7 but alas no. Grr.