I don't know how accurate this is but here's what I did:
I was having the double click and sluggish remote problems. Today I received my wireless adapter and switched it with the phone line as a source for receiving downloads. Instantly, the remote problem went away. It did not download a new software version, I'm still at 7.2.1. Dont know if this is the solution. Maybe people with the remote problem can report on what they use as a download source, phone line or internet.
Heyez, i was having a similar issue... mine was being caused by a 2.4ghz wireless audio/video broadcast/receiver thing-a-majig... The thing sends audio and video wirelessly to a remote receiver hooked to another TV. Well it has a "remote extender" built into it so you can change channels etc from the remote location... Either the 2.4ghz frequency or more likely the remote extender was interfering with the tivo's reception of it's own remote control since they were right next to eachother in the the stereo cabinet... I turn the wireless broadcaster off and the tivo remote is back to normal...
I called Humax today and they said that both them and TiVo are investigating the "double-click" issues. Apparently they are running out or have run out of refurbished units to swap with, so the support agent said that both Humax and TiVo are looking into a solution to be ready within the next week or two.
Does anyone who is having these problems use something other than TiVo 7.2.1?