評分: 5 / 5 顆星

5-star, but broken again... With addon enabled the header area doesn't show at all, with addon disabled header area with 3 lines appears.

此意見為舊版本 (2.18) 的附加元件。 

No headers at all? You possibly clicked "Hide Headers".
Right click a message or the message list and select "Show Headers" near the bottom.