I am currently using Thunderbird 140.6.0esr (64-bit). Operating system is Windows10, my computer doesn't meet Windows11 requirements. I use Thunderbird to receive messages from both my Orange.fr and Gmail.com accounts. I use the Message Filters tool on both accounts to sort the incoming messages into different folders to make it easier to follow threads. I have Thunderbird running in the background all the time that my computer is active. The Thunderbird Icon on the taskbar is set to show new messages. It used to show the total of all incoming messages, but now (I think just since the latest update) it only shows those new messages that have remained in the main inbox of either account, any messages that have been sorted into sub-folders are not included in the number shown on the icon. This means that when I have been away from the computer leaving Thunderbird running I now have to enter Thunderbird to see if any new messages have been sorted rather than just glancing at the taskbar. What setting have I missed or is this a "bug". More an annoyance than big issue. Thanks in advance for any guidance you can provide. John Shelley redacted@orange.fr