BuildCraft version: all-7.99.24.1
Forge version: 14.23.5.2825
Link to crash report or log: https://gist.github.com/DefinitelyNotFred/8e59bdaed64703928c90f6ee8999a785

What happens is that the background becomes a dark grey color. Another mod had the same issue which they've fixed. Apparently it's the openGL color not being set correctly before rendering the book's background, causing it to use whatever the previous openGL render color was. Link: Electroblob77/Wizardry#145