Sencha Touch sass corrupts png encodings

I have been trying to compile the application.sass in my Sencha Touch project into application.css.

According to sencha touch's forum, to compile the sass, I only needed to install compass & chunky_png. That is exactly what I've done. The following are my gems

compass (0.11.beta.7) chunky_png (1开发者_如何学JAVA.1.2, 1.1.0)

When I compile the sass. The resulting css seems to contain the included resource from the sass. However, all the png are translated into weird characters. I realize that it is trying to encode the image into base 64, but as far as I know, base 64 strings basically consists of A-Z a-z 0-9 + /, all being readable characters.

Using this generated application.css, my sencha touch app cannot read any of the encoded pngs at all. Can anyone help me?

I ran into the same issue a few weeks ago, but dumping the gems and grabbing the specific versions cleared things up.

Is this the thread you've already taken a look at? If so, have you already tried:

gem install chunky_png -v 0.12.0
gem install compass—pre

That did the trick for me.