When I'm on last page of results and increase amount of results per page.
On: http://area51.stackexchange.com/?tab=hot&page=35
When I select |50| per page, view shows "no results were found". result url: http://area51.stackexchange.com/?tab=hot&page=35&pagesize=50
And when using same trick on: https://meta.stackexchange.com/questions?page=4670&sort=newest
After selecting |50| per page view jumps to first result. result url: https://meta.stackexchange.com/questions?pagesize=50&sort=newest
Maybe it's not a bug but a feaure. Anyway it's a little disturbing.