It's impossible to create a new event in google calendar. Event properties are not display...
Creating a new event or opening and existing event doesn't work. A blue bar is displayed at the top the window and the rest is blank.
See also bug 18921.
This was probably a duplicate of bug 18921, and now works for me with the latest nightly. Can you confirm this, Nico?
I can confirm that this works fine for me in the latest nightly.
I can confirm that I was experiencing this problem for a while with Google Services for your Domain, and in the latest nightly, creating events now works.