This free update is now available in the Mac App Store with support for the new version 1.2 XML (see my review of Final Cut Pro 10.0.6 for the full details). Which means that this versions requires 10.0.6 and won’t work with earlier versions of Final Cut Pro. Here’s the list of bug fixes:
• Bug fix for error reporting in PSD and nested sequences
• Bug fix for detecting empty logging fields
• Bug fix for missing or offline media