Created attachment 137991 [details]
Windows 7, Chromium 20.0.1109.0
When two monitors are involved creating one desktop <input type=date> UI popup is opened on monitor, where browser initially was opened, this causes issues when browser is moved from one monitor to the other
attachemnts contais images of whole desktop (both monitor screens) ans shows how popup is misplaced (put on original screen) when browser is moved from one screen to the other (it works fine, when browser is moved back to original screen). It does not matter whether the original screen is primary monitor or not.
Created attachment 137992 [details]
I identified this is not a bug of WebKit code.