A few minor things:
Next Oldest / Next Newest should be just Older / Newer.
There's no way to go directly to the last page of a multi-page thread. Although there's a go to page fill-in box, nothing tells you the number of the last page. Guessing too big a number sends you to the first page.
The [url] bbcode feature from old posts doesn't work.
Unicode characters outside the 7-bit ASCII range from old posts were converted incorrectly. Apparently either the conversion script thought the old posts were in ISO Latin-1, or worse, the new software is using that instead of Unicode UTF-8. That's why so many old posts have lots of  characters in them: UTF-8 nonbreaking space characters were incorrectly converted. Also the tricky upside down c a l substitution turned into garbage because all the characters were multibyte UTF-8.
Next Oldest / Next Newest should be just Older / Newer.
There's no way to go directly to the last page of a multi-page thread. Although there's a go to page fill-in box, nothing tells you the number of the last page. Guessing too big a number sends you to the first page.
The [url] bbcode feature from old posts doesn't work.
Unicode characters outside the 7-bit ASCII range from old posts were converted incorrectly. Apparently either the conversion script thought the old posts were in ISO Latin-1, or worse, the new software is using that instead of Unicode UTF-8. That's why so many old posts have lots of  characters in them: UTF-8 nonbreaking space characters were incorrectly converted. Also the tricky upside down c a l substitution turned into garbage because all the characters were multibyte UTF-8.