I'm having an issue running Squeeze 6 on both my Mac (Snow Leopard) and PC (Windows 7) where certain preset settings will revert without saving.
For example, I created a custom filter for deinterlacing in Squeeze. I check the option to identify deinterlaced blocks, and after I click OK and re-open the preset I see it has reverted to off. This happens on the Mac and PC when using a custom preset, not trying to modify one that it ships with.
Now that I think about it, it did seem more like a software issued that would need to be addressed by Sorenson.
Either way, I contacted support. The check box to "Identify deinterlaced blocks" is not something to assist with the actual deinterlacing process. Although it's found in the filter settings and there is already a "Preview" check box, this is just another check box that shows you parts of the image that are already deinterlaced.