I just realized that the upgrade to WP3.0 went fine except for my post paging. Indeed I use the <!--nextpage--> tag in some of my posts to split my post in multiple pages.
Till 2.9.2 it was working fine, and :
Since 3.0, http://www.mysite.com/subdir/mypost/2 (or any other page) redirects to the first page of the post, e.g :
Although I saw there was a fix for the post paging in 3.0.1, I am not sure this aspect is covered.
Could anyone provide me some hints ?