The Recently Deleted folder isn't what you're thinking it is/does...
You might want to read through this thread:
http://www.tivocommunity.com/tivo-vb...d.php?t=303405
In short, what you can see in the Recently Deleted folder has always been there... when you deleted a recording in the past, it didn't get removed from the hard drive... you just couldn't see it before, but it was still there, until the TiVo needed that space for another recording and then it was removed...
The Recently Deleted folder just allows us to see those recordings before they're replaced and gone for good, giving us an opportunity to recover them in case we accidentally delete them. They will be removed, as they always have, when the space is needed for a new recording. Nothing has really changed in how TiVo records, deletes and re-uses that space. The only real difference now is that we can see them before that happens. Just think of it as a window to your hard drive.