.css('border-style') not working in FireFox 3.5.5 (Mac), jQuery 1.3.2

.css('border-style') not working in FireFox 3.5.5 (Mac), jQuery 1.3.2

I have a set of qunit tests for my JavaScript that I am creating.
On Safari 4.0.4 (Mac), I do this:
$(elem).css({ 'border-style':'outset' });
console.log( $(elem).css('border-style') ); // prints 'outset'
On FireFox, the same code produces an empty string.
Is it me?
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