User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Build ID: 20140715215003 Steps to reproduce: Received a CANCEL message for an existing event Actual results: The blue stripe didn't contain "Delete" button as it used to, so I could click on it and confirm the event deletion Expected results: There should be "Delete" button.

Welcome and thank you for opening the bug and providing already a patch! However, this bug is already fixed with bug 1047227 for Lightning 3.3.1. If you provide a patch the next time, please make sure to set the content type of the attachment to text/plain and request for a review (choose one of the proposed reviewers from the drop down list) - this ensures that you get a feedback on your patch, which is required to get this into the tree.