Not sure if "performance and connectivity" is the correct category. I recently bought a Mac-mini and set it up via iCloud. All seems to be working as before, except that website check boxes don't work properly. In some cases, check boxes are not visible; and when they are visible, there is no visual indication upon selecting the check box. The attached image shows two check box. Upon clicking on a circle, it does not turn black. And sometimes, the circle doesn't even display. Any help appreciated.

Ha, the checkbox below on this form "Email me when someone answers the thread" does not work show "checked" when I click on it.