I stopped using the Roku Channel; downloads were almost always very slow.
I did check, and show with a larger number of seasons did that.
Like MythBusters, 19 seasons. Trying shows with a lower amount worked as well as the movies I tried worked.
I do think 19 seasons can be a lot to get, but if it worked a week ago, like you say, most likely a change in the Roku Channel site.
Or try an earlier version of SF.
A 6-season show worked in 6252, as well as a 10-season show.
ADDED: I just tried a show claiming 24 seasons and worked, so it might be a problem with the site.
Trying 6249 also had an issue.
