[leishirsute]

Usually when I'm downloading Hulu movies that are longer than 1 hour, the download stalls.
1 Once I verify that the download is not moving at all, on the download screen, I stop the download and then restart it manually. The disk churns as the download tries to recover from the last good download point. Usually, the recovery attempt fails and a flag is shown to the left of the download.
2 Then I go back to the browser window and reload the movie URL. That usually causes the download to restart after a couple of minutes of positioning to the last good download point. After this the download usually completes.
This procedure works pretty solidly for me for Hulu downloads. I don't know if it works for other sites.

In my settings. I have disabled Auto Convert and Auto Preview and enabled Auto Switch.

Due to the Auto Switch setting, after I reload the URL in step 2, the download screen usually displays as the download continues.
Viewing the Download screen, wait a bit and watch the Speed and Elapsed time start to change to verify that the download is positioning.
Eventually, when it continues to copy, the Percent and Completed will begin to increment again.

It used to be that Getflv would automatically recover from a stalled Hulu download, but I haven't seen it do that in many revisions.

Hope this helps