One of the biggest complaints over Yahoo!'s contextual network, the Yahoo! Publisher Network, was that when you used multiple ad blocks on a page, it would sometimes show the same ad from ad unit 1 in ad unit 2. Reports via DigitalPoint Forums have been noticing that this has been happening less and less as the days go on.
Ads no longer repeat ad nauseam across your ad blocks on a given page. Before, depending on how many ad blocks you had on a given page, the same ad that showed up in the #1 ad queue position would show up in all the #1 ad queue position of all your ad blocks on that page. Not anymore. I'm no longer seeing repeated ads across the ad blocks.
After that post, it appeared that things went downhill again, but then recent posts have shown to confirm this.
I'm noticing more and more geotargeted ads, and no repeating ads too.
No repeats, CTRs are up by 75%. I'm happy.
3 bocks of 5 ads each and they are showing 15 different ads.
Which is very good improvement.
No official word from Yahoo! yet on this, I will track the thread.
Forum discussion at DigitalPoint Forums.
Update: A Yahoo representative has confirmed to me via email that improvements have been made to YPN ads and to keep an eye out on the YPN blog for details.
Update: Here is that blog post at the YPN Blog.