When you bid on like 20 or 30 (or more) auctions and click on the My Auctions tab, there is unimaginable lag that happens, generally 10 or so seconds before input can be put in again. I would suggest having it work with 10 or so per page when browsing auctions so one cannot miss on an item you are bid warring with someone.

It might have to do with keeping tab and keeping it up to date.