After updating to Premiere Pro CC 2014 yesterday, I see encoding artifacts on my H.264 exports.
Same source video imported into CC v2014 and v7, and exported using the YouTube 1080p 29.97 fps settings. The artifacts manifests itself as softness/blurriness in parts of the image every few seconds, especially notice the area with a red circle below.
Here are the source file (GoPro HERO3 Black Edition), the v2014 render and the v7 render.
Original: https://drive.google.com/file/d/0B2rJe0xgMTxFYXJiMjZpZ0stUzQ/edit?usp=sharing
CC v2014 render: https://drive.google.com/file/d/0B2rJe0xgMTxFQ1B0Z09GS3I0a1E/edit?usp=sharing
CC v7 render: Premiere Pro CC.mp4 - Google Drive
[Version numbers corrected.]
Message was edited by: Jim Simon