Attempted to load class binnie/craftgui/resource/minecraft/CraftGUIResourceManager for invalid side SERVER

[Former user]

I'm having an issue that I can only reproduce when running a server with pre6b, It works fine on the same world clientside but trying to open a apiarist/botanist database gives me

"java.lang.NoClassDefFoundError: binnie/craftgui/resource/minecraft/CraftGUIResourceManager"

and slightly farther down: "Caused by: java.lang.RuntimeException: Attempted to load class binnie/craftgui/resource/minecraft/CraftGUIResourceManager for invalid side SERVER"

Full Crash-Report:

http://pastebin.com/W0sZbkq3

[George Miller]

I am having this issue also. Bump.

Binnie, is there any way I can help?

[Alex Binnie]

Fixed in pre 7