The new ietestcenter CSS3 tests were landed in http://trac.webkit.org/changeset/111910, http://trac.webkit.org/changeset/112716, and http://trac.webkit.org/changeset/113882. However, no results were ever landed for Windows. I will land expected (failing?) results for Windows, but someone who knows more about the tests should check the results.
<rdar://problem/11562933>
Added expected (failing?) results for Windows in http://trac.webkit.org/changeset/119026