I have a posting in the author's forum too...
WP2.6.3, PHP5, plugin:2.0.8b2
Problem: If I click on the series title link (This post is part of Series Title Link) it pulls up what looks like an archive page of all posts, whether they're in a series or not. All posts.
Changing the permalinks to 'default' doesn't affect this behavior.
The Series Title URI looks correct:
This is holding up the entire show. Grrr...