I had a problem in Wordpress where in a category listing, the “previous” and “forward” links were returning a 404 error. I am using custom permalinks (/%category%/%postname%) and just couldn’t get it to work. Tried all sorts of fixes recommended at various places, but none seemed to fix it and I didn’t want to change the permalinks because the pages are in Google already and changing them would break the links.
However, I found a simple plugin from Doug Smith that sorts this known bug out:
http://barefootdevelopment.blogspot.com/2007/11/fix-for-wordpress-paging-problem.html
Cheers Doug 