Has this been fixed? I just tried updating to Spread 7.2, but IE11 continues to have problems. Making matters worse, it appears that Spread 7,2 attempts to invoke the 'MSGesture’ object, which is undefined in IE10 on Windows 7, which means that Spread 7.2 explicitly BREAKS IE10 and does not work at all in IE11. Attempting to create an MSGesture object in IE10 on Windows 7 means that Javascript stops executing, so client events do not fire.
Currently I am using the unsatisfactory solution of using the 'content’ meta tag to instruct IE11 to emulate IE10, plus providing the IE11 browser definition in app_browsers, but this is not acceptable to have Spread breaking both IE 11 and the workaround for a broken IE11.