What is Yahoo error 999?

I just tried to post a couple of photos of Christmas lights, and got the error from Yahoo, that I had an error 999?? Is this bad? thanks

I want to search Yahoo! feature for the Christmas light display on flickr posted yesterday (12212007), how?

I have search the answers but they are to narrow and don’t give me enough information on how they found the answer.
There is a saying “give a man a fish and he is feed for a day but teach him how to fish and he will be feed for a lifetime”

Please teach me to fish for the answer.

But the answer would be a start.

How do I post Christmas lights border on my 360 Yahoo page?