VB seems to deliver the wrong style's CSS

[TiKu]

Hi,

We've a phenomenon with the CSS definitions of our styles. We have the following style structure:

• MASTER-Style
  • VB4 Default Style (with very few customizations, not selectable by users)
    • Our Main Style (many customizations, selectable by users)
      • Special Style for a specific forum (not selectable by users)

VB uses templates from the correct style. However, CSS definitions always come from "Our Main Style". If I open the forum that has its special style, I get the special templates, but the CSS from the style's parent style ("Our Main Style").

The generated HTML code is correct, it always calls css.php with the correct styleid parameter in the URL. It also doesn't seem to be a caching problem - neither on the server side nor on the client side.

What could make VB 4.1.11 deliver the wrong style's CSS?