Precedence when checking for more than one attribute

[Georg Maaß]

Hi

I have two rule sets:

toolbarbutton[command="cmd_newMainWindow"][type="menu-button"]
{
list-style-image: url("chrome://gmL/skin/newMainWindow_small.png");
}

toolbarbutton[command="cmd_newMainWindow"]
{
list-style-image: url("chrome://gmL/skin/newMainWindow.png");
}

What I want is to use a smaller image for the toolbar button, when it is
of type "menu-button". What I expect is the more precise selector to
have precedence over the less precise selector. In this case the first
one is more precise, because it matches only on toolbar buttons with
both attributes set accurate.

But what I get is, the second rule always wins, but it should win only,
if the type attribute is not "menu-button".

Is my understanding of CSS wrong, or is there a bug in XULRunner
(Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.3a1pre)
Gecko/20090829)?

http://www.w3.org/TR/CSS21/selector.html#attribute-selectors