Bukkit

What steps will reproduce the problem?
1. Create an !invcount sign
2. Send a signal to it via redstone

What is the expected output? What do you see instead?
Line 3 isn't updated with the quantity.

What version of the product are you using?
1.1.1

Do you have an error log of what happened?
When doing a debug check, it throws and "unknown" message.

Please provide any additional information below.
The code for !invcount signs does not use the plugin.updateSignState() and returns false by default which emits the error.  These two changes made the sign work just fine in my case.