Gmail made two interesting (minor) changes in the user experience and seems no one has noticed it yet.
If you are a usability expert, tell us when do you use a button and when do use a link? Well, Gmail has links for following call to actions
But now, Gmail is probably doing a bucket test and here is what I got to see (in two different accounts)
But none of these changes are together seen in the same account! So all you UX folks, share your insights on these changes.