This is not directly related to ember.js, but related to the tools we use during development to build awesome ember.js applications. We have been using rake-pipeline along with rake-pipline-web-filters and minispade. These are all great tools and have made writing ember.js applications more enjoyable.
My team recently found a problem with minispade and IE8 with regards to sourceUrls and conditional compilation. This was preventing us from pushing this application to production. We quickly opened a pull request up with a fix. However, there has been no response to this issue and I have noticed there are a number of other issues that have not been addressed.
I completely understand the ember.js team is very busy. I am volunteering my time to help maintain the rake-pipeline-web-filters and minispade tools. I am very passionate about this sort of stuff. I even gave a talk on Ember.js build processes at a local ember.js meetup. I want to continue to educate the community on the toolchain so ember.js are easy to write, test and deploy.