My previous post wasn't quite right. Further mucking about reveals that if I click on a link on the face page, the download/stream process works as it should.
If I search for a link or go to "movies added" and click on a link from there and select any of the hosts, I get the auto-run or manually run script options.
Greasemonkey is installed and enabled and IQS 6.2 is installed obviuosly. What the heck is going on here??