I've found one bug regarding .EditorWysiwygModeCss and multiple css files.
I've got two css files:
1.css:
body {font-size: 11px;line-height: normal;font-family: Verdana,Arial,Sans-Serif;} //this is the default style.
2.css:
body {color: yellow;background-color: red;} //this is the site specific style.
The background-color and color will not be loaded if I define CE with:
ce.EditorWysiwygModeCss = "~/1.css, ~/2.css";
If I change the order of the CSS files, then the colors are set correctly:
.EditorWysiwygModeCss = "~/2.css, ~/1.css";
It seems like the second CSS file isn't loaded at all.
Regards
Zapotec