After creating a card I used to be able to press a number to add a label to the card. With the new version of Trello I can't add a label after creating a card, I have to open/edit the card first. After opening or editing the card I can add and remove labels using numbers.
When the card is closed and just part of a swimlane I can't add or remove labels on cards created with the new version of Trello. However, I can edit labels on cards created with the old version of Trello without opening them.
Hope this will be fixed as I love the option of adding a card and labeling it quickly.