I have deployed infopath 2010 to form library and opened form in IE10/11 browser, infopath form opens in document mode IE=8(chk with F12 developer tools) 
and due to this infopath form is generating some errors and not submitting correctly. Using IE10 "F12 developer tools" i changed infopath form document mode IE=11 from IE=8 and it works without errors. I tried opening same form in IE9, it opens in document mode IE=8 and submits without any errors.This is common for all infopath forms developed in infopath2010/2013. I tried below
1. changing masterpage tag from "<meta http-equiv="X-UA-Compatible" content="IE=8" />" to "<meta http-equiv="X-UA-Compatible" content="IE=10" />" and <meta http-equiv="X-UA-Compatible" content="IE=11" /> still form in open in IE8 document mode only.
2. changing browser settings is not recommended as this cannot be done for all users.