Affects Version/s: Minecraft 1.6.2
Fix Version/s: Minecraft 1.7.5
When you press tab, it is supposed to list thru all options, clearing the old list for the new one. Instead, it leaves a large amount of text behind if you have more then 1 line used.
To reproduce this:
Type the / character. Then type tab. Note that there are a lot of commands.
Press tab again. The list is shown again.
To see this better, try /scoreboard teams option asdf color and press tab.
It works fine.
Press tab again.
Note the mess it makes.
This is caused (probably) by the method
on line 275 in GUIChat.java (mcp names). It is creating a line of chat that will be overridden, but is only applying one line even though the message may be multiple lines long.