Apple has released Final Cut Pro X 10.0.9, a small update that fixes issues that could result in green artifacts when using Sony XAVC media. The release also addresses problems with failed exports that were related to interlaced media and retimed segments, and includes the usual unspecified stability improvements. ($299.99 new in the Mac App Store, free update, 1.64 GB)
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.