Sparrow has released version 1.4 of its eponymous email app. This update primarily involves performance and user-interface improvements, with everything from composing to synchronizing receiving a speed boost and some polish. Sparrow 1.4 also adds a few welcome new features, such as integration with the file sharing service CloudApp, pull-to-refresh, and support for proper first-to-last message sorting in conversation view. Several bug fixes round out the update. If Sparrow 1.4 prompts for your password at every launch, Sparrow suggests some possible workarounds until version 1.4.1 appears. ($9.99 new from the Mac App Store, free update, 12.0 MB, release notes)
Disable Caps Lock
If you find yourself pressing the Caps Lock key accidentally as much as I do, note that you can disable it entirely in Mac OS X. Open the Keyboard & Mouse preference pane, click the Modifier Keys button, and in the dialog that appears, select No Action from the Caps Lock pop-up menu. You could remap it to another modifier instead, but that might make using differently configured Macs more difficult.