I just tried buying another pre-pub, and it wouldn't work. I tried doing it several ways: by clicking on the Quick Buy button on the product description page, by clicking on the Pre-order button on the product description page or the Pre-order button in search/list view. All of those just dropped me into my Open Pre-pub Orders page with that book I'd just tried to order not having been added to the list. (The Pre-order buttons didn't even give me a chance to confirm my order.)
I tried it again on a different pre-pub in case there was some problem with that one. Same thing happened.
I finally noticed that I have exactly 200 open pre-pubs. I suspect this is a limit some programmer thought no real user would ever exceed, so they thought it would be OK to limit the number of open-prepubs to this. Well, meet Rosie Perera, Logos book addict. It's very frustrating to not be able to order a pre-pub because I've already maxed out on the number of open pre-pub orders I can have.
