In several years that Dishplayers have been out and people have been doing upgrades on them we've discovered some limitations or bugs depending on how you look at it. Here's at list of them:

• When the drive completly fills it seems that you loose everything on it, recorded programs, programs scheduled to be recorded, channel lists, etc. This is really unforutunate. (Thanks for Roger for pointing this out, too bad I noticed it the hard way too).
• There is a limit of 50 items queued to be recorded. On the 51st item, PTV will accept the recording, but it will display "null" for the program name, and there will be no red dot on the listing. (Thanks again to Roger, I haven't verified this).