This version has been yanked, and it is not available for download directly or for other gems that may have depended on it.
Any markup languages you are using and its dependencies. Haml and Markdown filters are touchy things. Redcarpet or Rdiscount work well if you're running on MRI. JRuby should be using haml 4.0.0+ with Kramdown. Compass and sass are no longer hard dependencies. You'll need too add them on your own should you want them. We also should be able to work with sassc.