First thing you need to figure out is whether it's the transfer speed or encoding speed that got 'slower'. If you have no features like 'commercial' cutting enabled, then it will download and process in one pipeline (which is more efficient, but makes it harder to see what's slowing it down). Go into Prefs, Advanced, and select 'Download first, then encode'. With that option on, you will see how long the transfer is taking, then how long the encode is taking. Odds are high that if it went from 10 hours to 20 hours, the thing that got slower was the actual re-encoding, and not the 'transfer'. This probably indicates that your processor is busy (or running slower due to powersaving modes?). Make sure you're not running anything else that is using up CPU... easiest way to check that is via the 'Activity Monitor' in Applications/Utilities... Sometimes a reboot of your computer might help clean up some rogue left-over processes... edit oops looks like you're sure it's the transfer and not re-encode that got slower? In that case, I'd check to make sure that the tivo is not 'busy' doing other things (like recording shows, downloading things, etc). All those things slow down the transfer speed.