I've installed 890.4222 WE version. I am having problems with speed cams warnings. I have tried various versions and patched them everytime I've copied in the maps directory, still everytime I go out I don't get any warning on cameras.
i've had a problem recently with speedcams in that the tomtom defaults to the standard fixed cams only and doesnt show mobile cams. i've got around this by just installing premium cams only i.e. fixed and mobile. also make sure you have mobile cams and mobile cams hotspots enabled in your speedcams menu options in tomtom services. also why have you not installed 895-4222 which is the latest map available