User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 Build Identifier: Thunderbird version 1.5 (20051201) The New Event dialog box expands by a few pixels - at a guess, 5 or 6 - every time I click on the More/Less button, or when I select an Alarm time from the Alarm dropdown. Reproducible: Always Steps to Reproduce: 1. Open New Event Dialog 2. Click on "More" or "Less" button, or 3. Click on Alarm dropdown and select an option. Actual Results: Dialog expands with each click. Expected Results: No dialog expansion. This is on Lightning 0.1RC.

Thanks for the bug report but this one has already been filed. *** This bug has been marked as a duplicate of 324312 ***