Comment 1 for bug 1003156

Thanks for your report! I was trying to duplicate your issue, and I was unable to even though we are using the same versions of ubuntu, Thunderbird, Lighnting.

Just to clarify, you go to edit an event in your calendar when you are on the calendar view, by clicking an event in the event list at the top of the screen.

The window that would allow you to edit the event appears behind the list of events. Does it appear ontop of for instance the calendar? And if you minimized the main thunderbird window does that allow you to do anything?

Also, did you try re-installing Lightning?