Firebug Issue with CSS Specifity calculation

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Firebug has a minor bug in it’s css module:

What steps will reproduce the problem?

1. add combined css rule (#bd a, #bd a.myclass)
2. add css rule with specifity higher than the first rule of the combined selector and below specifity of the second rule of the combined selector (like #bd .myclass)
3. add e.g. different color definitions to the rules

What is the expected result? What do you see instead?

IS: firebug shows the css definitions of the single rule with higher specifity than the second selector of the combined rule > strikes the definition with the de facto higher specifity)

Firebug Bug : CSS Specifity Calculation

WANTED: strike through the definitions of the single rule with the lower specifity

Which version of Firebug? (more specific than latest please): 1.4.2
Which version of Firefox? 3.0.13
On what operating system? Windows XP Sp2

Testcase:

style.css

testcase-css-specifity

Bug # 2274 in Firebug Bugtracker

Bug # 2274