When you go through posts using blog categories there's a 'Previous' link at the bottom of the pg. allowing you to read previous posts in the category. I don't understand why when you've read the last pg. in the category the link doesn't go dead or show you a diff. link that says "return to first category page." Instead, the default behavior is to try to find the next pg. And when WP doesn't find a next pg. it gives you a "page you requested was not found" error.
Shouldn't that work differently? It seems kinda like a waste of time to send you to an error pg. instead of telling you explicitly that you're at the end of the category.