some weird bug with posts_nav_link makes a 'next page' randomly appear for some reason.
sometimes it appears...
e.g. http://www.semiologic.com/cats/topics/it
sometimes it doesn't...
e.g. http://www.semiologic.com/cats/topics/it/blogging/
from trial and error, it looks as if being at the 2nd level (out of three) in the category tree is problematic.
root
- topics
- it <-- problem
- business <-- problem
from trial and error still, switching the number of posts to be displayed from 5 (current settings) to 20 makes the problem disappear. But that could also mean the problem will simply occur with more posts in that case.
feel free to email me (denis -|- at -|- semiologic -|- dot -|- com) if you'd like me to make the content of server-side variables in the page's source for you to spot the problem.