I have a problem with the chatbox:
When I call chat.tell("ply", "msg"), I get a java exception about the mod didn't found the "Vec3 func_70666()" function in EntityPlayer. This only happens on the server-side.

I'm using the 1.2.7 version of the mod on Minecraft 1.7.10 with Forge #1291 running in Java 1.8.0-ea-b120 (Java8)

We need a log to help you.

There is nothing, the server console is "empty", there's nothing on the client side (why would there be?), the logs are "empty", the only thing I see is this image of the computer. The server log is too big to be sent, and there are no initialization errors, nor anything about malfunction. It looks like it's caused by CC, or even LuaJ, that caught exceptions are not .printStackTrace()'d. I think that the exception is thrown at com/austinv11/peripheralsplusplus/utils/ChatUtil.java at line 43, where it makes a call to player.getPosition. I think this is caused by some weird (de)obfucation on the server side. This may be a bug in Forge, so I'll update, and report the progress.

Nope, it's the same for Forge #1360

Sorry, I misread your original message. Austin has identified the issue and will be working on it.