fillText() or strokeText() don't respect the globalAlpha. It can be fixed by using globalAlpha directly in drawTextInternal(), but it could be better to add globalAlpha support to FontMac.mm and the other ports. Other parts of WebKit (like SVG) could benefit of this.
Created attachment 25199 [details]
A testCase for the issue. The globalAlpha is set to 0.5 at the beginning.
On the Mac with the latest nightly build, the text in the test case already appears to respect globalAlpha.
Only Cairo has this regression.
fixed in r41279.