Hello! My coworker is experiencing an error when accessing her inbox. We haven't come across a way to trigger the error through a specific keystroke, etc. She is using Apple iOS Mavericks on an iMac and operating Thunderbird 31.1.2 w/ the Lightning calendar installed. Some times when she accesses a message in her outbox the message in the first column doesn't match what is being displayed in the preview pane. For example, she could click on a message from Jennifer Kelly which is a normal composed email with a PDF attachment, but the preview is of a meeting request for a completely different company and person. Here is a resource image to try and provide for insight: http://www.wilmingtondesignco.com/files/resource.png Please let me know what you think! Thanks, -Eric