I have my account set to 50 posts/page, so I normally see multiple pages listed in the forum view when a thread has over 49 replies.
In this forum: http://forum.java.sun.com/forum.jspa?forumID=515
The thread "Troll account", does not have the usual "1 2" listed next to it, linking to each page. It currently has 98 replies, so maybe there is a bug in the display code on certain edge cases? The page links appear when I click on the actual thread.
If I look in the concurrency forum: http://forum.java.sun.com/forum.jspa?forumID=534
The thread titled "question about synchronized" has 50 replies, and has the "1 2" listed next to it.
EDIT: Interesting, while I was posting this, the reply count went up to 99, and the page links reappeared.