Any client (e.g. your Web browser) goes through the following cycle when it communicates with the Web server:
Obtain an IP address from the IP name of your site (your site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs).
Open an IP socket connection to that IP address.
Write an HTTP data stream through that socket.
Receive an HTTP data stream back from your Web server in response. This data stream contains status codes whose values are determined by the HTTP protocol. Parse this data stream for status codes and other useful information.
This error occurs in the final step above when the client receives an HTTP status code that it recognizes as '500'.
This means the error is either on the server or any of the routers in between is corrupting the data output stream causing this error, as Telkom is resetting the DNS servers every night (to prevent people from hosting a website on their personal computer) the error may well be caused by DNS servers with out of date addresses which causes the routers to route information all over the world to wrong clients instead of only your client / web browser.
The DNS servers is like a telephone book translating the website address from forums.wayoftherede.com to an IP address that the server can actually understand (the actual IP address of the site at the moment is: 68.178.254.170) Since this IP address is not static (the address changes from time to time), all the telephone books have to be updated at one stage or another and since Telkom resets all telephone books every 24 hours, occasionally things get messy when the server requests an update on each telephone book while at the same time Telkom wipes the records. So what in fact is happening, while the server updates our local telephone book, Telkom is wiping it and packages which is routed all around the world through different routers are sent to the wrong addresses, it's like chopping up a body and sending the leg to China, the head to SA, the arms to Brazil because of out of date telephone books.
Hope that makes sense, unfortunately not much I can do about it (except buy out Telkom if that was possible

)