Forum:Entity.name chat error

Hi. I'm getting it while playing at my mcpc+ server (1.6.4 F965, latest build at the moment of mcpc's death). But everything is fine while i'm in single player. Any ideas how to fix it?

Here's a screen.

http://cs620031.vk.me/v620031091/1a638/v6GnkfXyVf0.jpg