I'll also confirm that I use Thunderbird and have had other strange issues with Thunderbird windows not closing correctly after messages are sent. The application can be completely killed yet Dock still indicates that there are windows available (but no way to access them).
I'll also confirm that I use Thunderbird and have had other strange issues with Thunderbird windows not closing correctly after messages are sent. The application can be completely killed yet Dock still indicates that there are windows available (but no way to access them).