Crashing due to Elm Stair

[Bunsan Minecraft]

Upon putting an elm stair in the active slot of my hot bar the client crashes with the following crash report attached or http://pastebin.com/zSL4HXci This was a clean install with just forestry and binnie's mods default configs. Tested other elm items.

[Former user]

Same thing, just Rosewood stairs to me.

http://pastebin.com/6jht5Y1R

[Alex Binnie]

Fixed in 1.7.5 / 1.8-dev2