There were some uses of System.import that break IE8. I've fixed all
of these issues and released 0.11.2 with all tests passing in IE8. You
should have no problem upgrading from 0.10.3.
Note that you can't use ES6 syntax with IE8 as both Traceur and Babel use ES5 features.
Note that you can't use ES6 syntax with IE8 as both Traceur and Babel use ES5 features.