It stopped working for others too. When you use a program to make the call it returns a 999 error. If you put the string in a browser address bar it works just not with curl or get_file_contents. I have been using the same program for almost a year and now it does not work. I even went back and wrote a test program just like the one on the developer's web page and it did not work. Other forums are complaining too. There is a problem at Yahoo. We need to know what it is!
sh1mmer, I'm sorry I don't even know where to look for an error message, but in the script I use, at the same time as I query Inlinks I also query five other services, like Delicious, Bloglines, etc, and those other five still return results like normal so it just seems to be a new problem with the Inlinks service.