User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20160420141331 Steps to reproduce: 1. Open a dialog to create an event 2. Open the attendee dialog to invite some people 2. Type "myexample@example.com" to invite this person 3. Close the attendees dialog 4. Re-open it, edit the email without remove all the line and write "totally_different@example.com" 5. Close the attendees dialog 6. Re-open it or save the event Actual results: The old email "myexample" is still invited and "totally_different" is not on the list. Expected results: The new email should be present and the old one removed. Note : the following steps work to change the attendee: - Remove all the line ("myexample") to let it empty - Close the dialog - Open the dialog again then type the new email "totally_different" - Close the dialog Then the attendee is "totally_different"

Confriming. If this is going to be fixed, one should also look at bug 1008681.