A Combined javascript seems to work.

1) CSS files are added to the combined version by use of $theme->css() or $theme->css_theme() methods
2) url references in the css are converted to full paths as opposed to relative
3) @import statements in the css are resolved as well.
4) need to move the [if IE] statements into the css files so the will be honored in the browser. currently the ie fix css are always included.

modules/gallery/libraries/Admin_View.php

@@ -99,6 +99,7 @@ class Admin_View_Core extends Gallery_View {
       }
 
       if ($function == "admin_head") {
+        array_unshift($blocks, $this->combine_css());
         array_unshift($blocks, $this->combine_script());
       }