FixedMultipage threads do this in the liquid style. It does it both in Opera and FireFox for me.
Go bigger than 800x600
fix mac safari3
projectTriton Liquid
The yellow dot doesn't take you to your last post like it did under the old theme and it says "Last" for large threads instead of the page number. *KNOWN*
Also, it appears that some posts are combined into the same row on the forum display page.
Known issues:
* There is no pagenav at the bottom of threads or forums, pagenav is at top
New threads aren't showing up. On the gen discussion page it still is asking me to log in, even though I already am logged in.