The SiteExplorer API has been showing similar errors and the team is working on it. I'm not sure if that is the specific search API you are finding errors on, but if so, we are aware of it and are in the process of fixing it.
If it's not that API, please let me know and I'll make sure the team is notified.
Thanks,
Robyn Tippins
Community Manager, YDN
So it does not function properly and no one knows why?
Is there somewhere that I can go, or someone that I can talk to in an attempt to get more information?