Specifically, people are running it and are being returned a 404 error that reads:
Webmaster Tools - 404
The page you are trying to reach does not exist (404).
Google's JohnMu chimed in over the weekend to say he will send it up the chain to be fixed. He said:
Thanks for your report. I'll pass it on to the team to review and get back to this thread once I know more.
I personally tried it a couple times and it worked for me but it might be a sporadic issue.