Board Thread:General Discussion/@comment-27403314-20140529041535/@comment-366087-20140529113002

Yes. The software and system throttles repeated actions such as Renaming within a short period of time. The reason being that such activity might be indicative of a vandal.

It's been a while for me, but I believe it is about 4-6 renamings within as many minutes, after which you are instructed to try again later (I *think* like about half an hour) or contact a local admin.