While it's definitely worth noting that this happens with "all clips," when it comes to attempting to reproduce the issue, knowing exactly what resolutions and pixel aspect ratios you've tried could really help. In particular, does it happen with clips that match the sequence settings exactly?
Also, what does "1920 x 1080 Sony xdcam ex 60" refer to? If I had to guess, I'd say it's the sequence's setting. But since I asked about the settings for both your sequence and your assets, it's not a very safe guess.
Other details:
- Exact version of Premiere: 2014.0.0 or 2014.0.1
- Operating system
- Graphics card version and driver
- Is Renderer set to GPU acceleration or Software-only? (File>Project Settings>General)