Version 2.0.0-rc.1
v-model does not seem to work in Internet Explorer 11 on input type=range fields in the release candidate. It does work without any problems in version 1 of vue.js, however.
Working example with vue.js version 1: http://fiddle.jshell.net/05vax3b2/1/
Same code but with vue.js 2.0.0-rc.1 included: http://fiddle.jshell.net/kzkfv5y3/2/