AFAIK a user is allowed to ask questions only once in 20 minutes, but this user asked two questions in just five minutes.
The questions are
Differences between restricted repositories and partner repositories?
What are the differences between "precise" and "precise-updates" and "precise-backports"?
Was this because he has 3k+ rep, or because of his tags, or a bug?
2014-07-11 07:54:28and the other at
2014-07-11 07:59:52. Thus in fact, it's more than 5 minutes. It's 5 minutes and 24 seconds. What is the restriction? One question per 5 minutes?