Apple today released iTunes 10.6.3, the latest version of its digital media management software. According to the release notes, version 10.6.3 includes support for OS X Mountain Lion and addresses a number of issues, including a problem where iTunes may become unresponsive when syncing a first-generation iPad that contains an iBooks textbook, an issue where photos synced to a device appear in an unexpected order, a problem where iTunes may unexpectedly…