Everything was working fine until yesterday. I attempted to edit an event and change the time to later in the day. When I attempted to edit the event, a window opened that did have the Tool Bar, but no content. The entire window was gray. I attempted to edit other events on my calendar, some I could see, some I could not. It appears that I can see events created by others, but not my own. A permissions issue? I was also able to drag the original invitation to another time, but still unable to actually edit it. I attempted to create a new event, but the same thing occurred, a gray box with just the tool bar.