Apple has released iMovie 10.0.2 with fixes for unspecified issues that were causing the video editor to crash. The update also fixes two sharing issues: one that would cause sharing to fail outright and another where the Share button would not respond. Other changes include fixes for instances of blank project thumbnails and high-resolution images that appeared green, plus resolution of a problem where the Crop, Ken Burns, and Map features were not accessible on Macs using certain languages. iMovie 10.0.2 now requires OS X 10.9.1 Mavericks. ($14.99 new from the Mac App Store, free update, 1.94 GB)
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Set a Default Finder Column Width
When in column view in the Finder, if you want to set the width of all the columns to something different - and have it stick! - Option-drag one of the column handles at the bottom of the window.