For page 2, I see a network request such as this:
https://pinside.com/pinball/forum/forum/technical-help/page/2
Response headers:
Cache-Control: no-cache, must-revalidate, max-age=0
Connection: keep-alive
Content-Encoding: gzip
Content-Type: text/html; charset=UTF-8
Date: Thu, 04 Jun 2015 16:24:58 GMT
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Last-Modified: Thu, 04 Jun 2015 16:24:58 GMT
Pragma: no-cache
Server: nginx
Transfer-Encoding: chunked
Vary: Accept-Encoding, User-Agent, Accept
X-Powered-By: PHP/5.3.10-1ubuntu3.16
However, the content itself is empty. Or possibly two blank lines, if I'm reading this debugger correctly.