Sharing will help others try to replicate what your are seeing. Just a file or two will do.
There have been no other reports of preview blurriness, AFAIK.
You might try installing this release.
For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee is required in order to register the newest. Retain your old install file and registration info. If there's an issue, you can always revert.
Also, confirm that the PC's video driver and Direct-X and current...
AMD / ATI users: [http://support.amd.com/us/gpudownload/Pages/index.aspx](http://support.amd.com/us/gpudownload/Pages/index.aspx) Intel users: [https://downloadcenter.intel.com/default.aspx](https://downloadcenter.intel.com/default.aspx) nVidia users: [http://www.nvidia.com/Download/index.aspx?lang=en-us](http://www.nvidia.com/Download/index.aspx?lang=en-us) Update DirectX: [http://support.microsoft.com/kb/179113](http://support.microsoft.com/kb/179113)