Mac OS X/Linux only: The popular BitTorrent application Transmission updated to version 1.70 a couple of days ago, then quickly released 1.71 today.
The 1.70 release introduced several small but worthwhile fixes and updates, including large speed improvements with its web-based remote control interface, along with bug fixes and plugged memory leaks. The subsequent 1.71 release fixed some high CPU usage problems introduced with the 1.70 release. If you regularly use Transmission, now seems like a good time to update. For the full low-down, hit up the 1.70 and 1.71 changelogs.