Does anyone know if iBooks is compatible with iPhone 3G? I installed iBooks on my 3G, and although I can open the app, it is entirely unusable. The lag is so horrendous that any tap would have a response time ranging from 20 seconds to a whole minute, and sometimes completely freezes. Yes I have restarted my phone prior to using it, and I only have SIX books in iBooks, so that's not a lot and shouldn't cause any problems.