Along with OS X Mavericks 10.9.3, Apple also released an update to iTunes for Mac and Windows that improves Podcast browsing to iOS devices and other improvements.

iTunes 11.2 makes it much easier to browse Podcasts, by letting you easily see unplayed podcast episodes and filter those episodes that can be streamed. You also have the option of automatically deleting podcasts after listening to them, or saving them on your computer.

Here are the full release notes:

This update includes the following improvements: 

Improved Podcast Browsing 
-Quickly find episodes you haven’t listened to in the new Unplayed tab 
-Browse episodes that are available to download or stream in the Feed tab 
-Save your favorite episodes to keep them on your computer 
-Episodes can now be automatically deleted after you play them 

This update also resolves an issue where iTunes may become unresponsive when updating Genius and improves overall performance and stability. Podcasts for iOS 2.1 or later is recommended when syncing podcast episodes. 

For information on the security content of this update, please visit:http://support.apple.com/kb/HT1222

You can download iTunes 11.2 from these direct download links:

• Mac
• 32-bit Windows
• 64-bit Windows

Alternatively, you can check the “Updates” tab on the Mac App Store to install iTunes 11.2.