Using alternate stylesheet doubles loading of style files

When choosing an alternate stylesheet in XE we double loading of styles file.
Example:

• using toucan skin
• choose no style file

The header contains

<link href="/xwiki/bin/skin/skins/toucan/style.css" rel="stylesheet" type="text/css" />

• using toucan skin
• choose style-blue.css as style file

The header contains

<link href="/xwiki/bin/skin/skins/toucan/style%2Dblue.css" rel="stylesheet" type="text/css" />
<link href="/xwiki/skins/toucan/style.css" rel="alternate stylesheet" type="text/css" title="Alternate StyleSheet 1" />

This is bad.

Note the style.css is directly taken into skins/toucan and not into skin/skins/toucan/
All styles are loaded twice