DumpRenderTree and WebKitTestRunner use RenderThemeSafari instead of RenderThemeWin. This is good for sharing results with Mac, but bad for testing the code that actually runs on users machines. It's also a maintenance burden; as new form controls are added, support for them needs to be added to RenderThemeSafari, even though users will never see that version of the form control! (E.g., bug 48690, bug 54662) We should probably switch from using RenderThemeSafari to using RenderThemeWin when running regression tests. Unfortunately this will mean having more Windows-specific results. But it's just silly not to be testing code that users actually use.
<rdar://problem/9017127>
*** This bug has been marked as a duplicate of bug 25592 ***