Apple has released iTunes 11.3.1 (Mac, Windows) for OS X Mavericks today with a bug fixes for subscribed podcasts not receiving updates and for podcast episodes lists becoming unresponsive while browsing.
iTunes 11.3.1 addresses a problem where subscribed podcasts may stop updating with new episodes and resolves an issue where iTunes may become unresponsive while browsing your podcasts episodes in a list.
The update is available in Software Update in the Mac App Store. The previous iTunes release, iTunes 11.3, brought iTunes Extras in HD to the Mac, and iTunes 12 is coming this fall with design updates for OS X Yosemite.
Apple today has also released a Digital RAW Camera support update with compatibility with the following cameras for the soon-to-be-discontinued iPhoto and Aperture apps: Nikon COOLPIX P340, Nikon 1 V3, Olympus OM-D E-M10, Olympus STYLUS 1, Panasonic LUMIX DMC-GH4, Sony Alpha ILCE-7S, Sony Alpha ILCE-5000, Sony Alpha ILCE-6000, Sony Alpha SLT-A77 II, and Sony Cyber-shot DSC-RX100 III.