St. Clair Software has released Default Folder X 4.6.8, adding compatibility for the public beta release of OS X 10.10 Yosemite. The update also improves the speed of the Rename command and fixes a bug when running in 10.9 Mavericks so you can use standard contextual menus instead of those provided by Default Folder X. ($34.95 new, $10 off for TidBITS members, free update, 10.6 MB, release notes, 10.6+)
Compare More Easily in Apple Mail
In Apple Mail, if you need to work back and forth between two different views of Mail's mailbox contents, you can do so quite easily. For example, you might want to look at a mailbox holding all filtered-in sales orders from the past week while also looking at a smart mailbox showing unanswered customer questions.
To avoid constantly clicking between mailbox views and losing your context each time, choose File > New Viewer window to get a second window and then arrange each window as desired.