Compression with CSS filters break image file name with space in CSS result

[stasdavydov]

I have the background image CSS rule used file with a space in the name:

#checkout_form .credit-cards {
    background-image: url("../imgs/Credit cards.png");
}

{% compress css inline %} block produce the following result:
#checkout_form .credit-cards{background-image: url("../imgs/Creditcards.png")}
Space in file name is removed.

I use the following CSS filters:
COMPRESS_CSS_FILTERS = ['compressor.filters.css_default.CssAbsoluteFilter', 'compressor.filters.cssmin.CSSMinFilter']

[karyon]

hey, it would be cool if you could check whether it's the AbsoluteFilter or the minifier!

[karyon]

So, it looks like rcssmin is causing this. i built a test to assert the CssAbsoluteFilter is working correctly (#805) and opened ndparker/rcssmin#7.