New
#31
If Haali video splitter is installed (click Start, type "Haali Media Splitter", press enter) go to the options tab, in the Explorer integration section there is a "Thumbnails offset" setting. This setting defaults to 0. I've set mine for 10000 ms (10 seconds) and I'm getting decent thumbs now.
Be sure to use Disk Cleanup to remove all cached thumbnail files after making the change.
PS - The setting doesn't seem to be stored in the registry... It's either encoded before storage, or saved to a file instead.