I just released a new version of BiblioCraft that will fix the crashes related to the change in the FakePlayer class in the newest versions of forge. This build should still work fine with older builds of Forge that are currently supported. There are no other new features in this version, this is just a crash fix that seemed pretty important to get out as soon as possible. For the link see the downloads section or the grab it from Most Recent Downloads widget on the right hand side of the screen. Enjoy.