After installing IE 11 Preview, I discovered that when responding to an Email Live message the received email and my response were both miniscule. I normally have my page view set at 150% to enable me to read the messages.  Now I have to select the received email and set it to 24 point plain text and my response the same.  Outlook had this same problem but now provides the page setting of 150% and it is still enabled when I respond to the message.  I  updated my Build from 15 (2011) to 16 (2012) hoping that would solve the problem with no effect on the problem.  After spending two hours downloading IE 11 Preview and updating/upgrading, I don't relish the thought of unistalling it which may NOT be the cause of the problem anyway because Outlook is still working fine after the installation of IE 11 Preview.