The TV show could not be used because the original file could not be found

Question

"The TV show “Blah-blah ep.23” could not be used because the original file could not be found. Would you like to locate it?"
I know this problem is listed (and unanswered) from quite a few users in the forums for song files, but I haven’t found any that mention TV shows. To add to the heap, and help emphasize to iTunes that this is a major bug in need of fixing, here is my version of this problem.
I have a variety of season passes to TV shows that normally download on almost a daily basis (The Daily Show with Jon Stewart, for example). About once every four or five downloads iTunes decides to silently delete a file. No warning given, no chance to stop it, just gone. ITunes downloads the file (clearly seen in the process in the Downloads part of the Store menu) and then lists the file under its correct menu in the TV Shows Library section (with the correct amount of MB listed for the file). I usually watch the episode right after I download it (with no problems), but of course I have left episodes unwatched when I shut iTunes down.
On the next startup of iTunes, I go in to watch an old episode again or click on an unwatched episode, but it isn’t there anymore and the old “would you like to locate it?” message pops up. After being through this at least a dozen times in the last year, I know there is no point in looking for the file because it’s gone. The only choice is to go into iTunes support and ask them to reset the download, which they’ve always done without question, and then I have to download the file all over again. This is a huge hassle and all the more frustrating because it happens so irregularly.
I’ve tried to find answers in these discussion forums, but have been unable to see any reasonable solution and wish to add to the voices of annoyed paying customers in the hope something will be done. If anyone is interested, the bizarre and time consuming workaround I’ve had to employ is:
1. As soon as any of my TV shows are downloaded, I stop whatever I’m doing to go grab the file out of iTunes’ folder and move it to a location where iTunes can’t get its grubby little silent deleting hands on it.
2. On the next shutdown-startup cycle, I can then go back and move the file back into its correct location in the iTunes TV Shows subfolders and I’ll never have a problem again with THAT particular file being deleted.
Of course, the problem with this solution is that it’s painfully annoying to have to do it every time. I get lazy, iTunes seems to get its evil deleting ways under control and downloads all seem to work again. That is, until they don’t and the issue mysteriously returns with files being picked off anew and I have to return to these forums in the hope of finally finding out why this is happening. After more than a year and two or three iTunes version updates, it’s the problem that just won’t die.
Anyone?

Answer 1

Yes, only TV shows. I've never had a random silent delete of a song file. I also considered that Windows might be blocking the file to save space, but with no limitations set in the control panel that isn't the problem either. In fact, I've only had this problem with season pass downloads. It's never happened with a single download of a video or TV episode.
Tonight, when I downloaded my Daily Show episode, I really kept tabs on what the heck iTunes is up to during the process. As many know, iTunes creates a folder called Downloads during the download process. Inside that folder, a video file gets downloaded as “download.m4v” along with another Qtime info file. When the download is complete, iTunes is supposed to use the info file to identify and tag the download.m4v file and then move it over into its correct artist subfolder with the correct file name.
The problem, I discovered tonight in watching this process, is that iTunes (for mysterious reasons) does not do the relabel/move step with some of the downloads and leaves the files in situ as download.m4v in the download file. Additionally, in the iTunes software you can click on the file (correctly labeled and appearing, as I said in the first post, under the correct TV show banner) and watch it one time. However, after shutting down and restarting (and this is where the evil happens) iTunes will delete all files in the Download subfolder as part of a cleanup process. I suppose because it assumes that those files were correctly relabeled and copied into the corresponding TV show folders. So, there is the reason for the loss of downloaded video files (in my case).
There appears to be no way of knowing, from within iTunes, when the file has been correctly copied over to its corresponding folder and when it hasn’t and remains in the Bermuda Download Folder of Death. Again, I have to go into that folder each time (before shutting iTunes down) to make sure the move took place. If it didn’t, then I have to make a copy of the download file and place it outside that folder.
Finally, since this only happens occasionally, I’m wondering if it doesn’t have something to do with the way the info file is being tagged and labeled prior to being made available to download. However, if that were the case then the problem would be happening to lots of users and I would have expected a lot more complaints in the forums.
By the way, I’m not big on fidgeting with any of iTunes folders or settings. It hasn’t been the case where the downloads were fine, I made some goofy change to the folder structure and then it doesn’t work. I haven’t fiddled with the settings for months, but all of the sudden this issue starts to appear and can just as easily disappear in the following week’s downloads.
Still seeking answers or advice.
Cheers.