The links that should take you to the first unread post you have in a thread (hm, not quite "newest post" as the link is named)
do not work in Opera 9. For some reason the server doesn't return a URL with an anchor tag in it for Opera when you request a thread with /viewtopic.php?t=xxx&view=newest. "View latest post" links work, of course, since they're already given as urls with an anchor tag.
for testing with a portable version if you can't bother installing the best browser there is.