UPDATE: Neil from Stardock has responded (and I've replied) on the blog's comments and the WindowBlinds forum. The WB forum is easiest to read, so I've linked to his post there. Continue down that thread for replies and other discussion.
UPDATE 2: From a support request I just handled and confirmed, we've also found that the current version of WindowBlinds breaks the Configuration Backup and Restore wizard in Opus, making it so that nothing happens when you click Next. There are probably other issues as well. As a general rule, if you're using WB with Opus right now and something doesn't work, try switching to Windows Aero.
UPDATE 3: List of related issues and their statuses: leo.dopus.com/dowb/index.html#summaries
UPDATE 4: Stardock have released WindowBlinds 7.30a Beta for registered WB users, with fixes to the Directory Opus issues (and a bunch more). Use it in conjunction with the 10.0.3.1 beta (or later) versions of Opus. I'll post about this separately as well, so more people see it.
I'm posting this as a sticky for a few days to help spread awareness.
[ul][li]url=http://blog.dopus.com/2012/01/windowblinds-breaks-opus-and-stardock.html WindowBlinds breaks Opus[/url][/li][/ul]
Also, I'd be interested in feedback on the four videos (the first three more than the fourth; the fourth is intentionally under-produced) as they've been a bit of an experiment for me in doing this kind of video with narration (and subtitles), and getting to grips with the video-making software a bit more than I had before. Hopefully I can put that experience to use in future tutorials.