Please reconsider the use of the "TAB" key as the default key for pasting coordinates in chat. At the moment, this is causing bad behavior by default:

• TAB is used by vanilla Minecraft for showing the list of players in a multiplayer server. Zyin's HUD 1.0.1 breaks this feature even when chat is not open
• TAB is also used by vanilla Minecraft chat for auto-completing names and commands. Zyin's HUD 1.0.1 breaks these by inserting the coordinates, then the auto-completion takes over and rewrites parts of those coordinates with a name or command

Thank you for the bug report. I changed it from TAB to F1 in v.1.0.2.