Apple has released Thunderbolt Firmware Update v1.1, which addresses a problem with the mid-2012 MacBook Pro (when using certain Thunderbolt cables) that prevented some bus-powered Thunderbolt devices from working as expected. The update requires Mac OS X Lion 10.7.4 or later. (Free, 442 KB)
Expand Finder Columns Quickly
Column view in the Finder is great for navigating through your disk's hierarchy, but the columns often aren't wide enough to show the full names of all the files. To expand a column to a width that will show all file names in their entirety, double-click the handle that you would normally drag to expand or shrink the column. To expand all the visible columns to that width, Option-double-click the handle.