XF 1.4 Problems Changing Prefix Names

[WearableTechForums.com]

I added the character # to some of my thread prefixes, and now I'm having trouble removing them. When I try, the page refreshes and the character is still there. I'm noticing I actually can't change the prefix names at all, whether they have the character or not. It's possible this is linked to another problem I'm having right now: https://xenforo.com/community/threads/logging-in-not-working.86977/

Please help. Thank you.

 

[WearableTechForums.com]

Update: They seem to have updated, but there was some sort of delay. Something strange is going on.

 

[Jake Bunce]

Several customers are reporting similar problems this evening. All appear to be nginx servers with Hostgator. Please contact Hostgator about this. These are the response headers that I have observed:

Cache-control:max-age=86400
Connection:keep-alive
Content-Encoding:gzip
Content-Length:3770
Content-Type:text/html; charset=UTF-8
Date:Thu, 13 Nov 2014 06:54:45 GMT
Expires:Fri, 14 Nov 2014 06:54:45 GMT
Last-Modified:Thu, 13 Nov 2014 06:54:45 GMT
Server:nginx/1.6.2
Vary:Accept-Encoding
X-Frame-Options:SAMEORIGIN

This is generated by a PHP resource which should not be cached.

 

[WearableTechForums.com]

Thanks!