Botania version: Botania.r1.8-248-MC1.8-d0e4e43.jar
Forge 1724

Got a crash while browsing through Lexica Botania: http://pastebin.com/A4sv3W2y

Please use the latest Botania, I believe it has fixed this problem already. The latest version disables the problematic portion of code (Thaumcraft integration) and the next build should fix it.

yup, it's fully fixed in the next build, thanks for the patience! ^