Put the summary of the bug you're having here
What I expected to happen was...:
Be able to chat to users logged on
What actually happened was...:
Shut down or said 'Cannot send this message"
Steps to Reproduce:
1. Log in
2. Join Public Server
3. T to Chat
4. Crashes
Environment
OS: Windows 7 (ver 6.1, arch x86)
Java: 1.7.0_25 (by Oracle Corporation)
Launcher: 1.0.8 (bootstrap 4)
Minecraft: 1.6.1 (updated Tue Jul 02 18:27:58 BST 2013)
Based on a crash report provided in this issue, I believe with high certainty that this report may be a duplicate of MC-20163. You can view all information known about this specific crash at MCX-777.