The first update to note is the implementation of link scanning. This is being done to prevent malicious links from being added to Padlet notes and walls.
The second update is a tweak to the attachment picker for adding materials to Padlet notes. You now have the option to drag and drop files into notes rather than just using the standard file select and upload option. In some cases this should make adding attachments to notes a little quicker than before.
To learn more about Padlet and how it can be used in your classroom, please take a look at this playlist of tutorial videos.