I was going to type that I also had the issue. However I don't like it when things don't work so instead I went and found the solution to the problem.In the menu where your Chrome preferences and options are, upper right corner (looks like 4 little bars), select "relaunch/run Chrome in Windows 8 mode". It will restart Chrome in that setup, relog into the game and you should be able to type in the Tribe Chat window.