Greetings, I’ve just posted version 2.4.6 of BiblioCraft up on the website and on CurseForge. Thanks to Exopteron on GitHub, the networking system has been updated to the newer system and hopefully fixed an exploit. In addition, I expect these changes to make updating BiblioCraft to a future Minecraft version easier. Aside from that, I fixed a bug with the desk bell and display case not making sound on a server.
Head on over to CurseForge or the Downloads page to grab an updated copy of BiblioCraft. Enjoy!