I've been looking for hours and I still have not found out how to do this without having to code a plugin, which I have no clue how to do. I have the developmental release of World Guard supported for 1.3 and the dependent world edit version (5.4.2) yet the potion-splash flag does not do anything. The only plugin I could find to disable potion use is Bad Potion but that does not work in 1.3.2 R0.1. I really need to be able to disable this because people keep lagging my server by throwing splash potion. Also, down grading bukkit is not an option as I have a few plugins dependent on 1.3.2 R0.1.