I've found that upgrading the firmware without the remote being connected to the mains can still cause problems. Just thought it was worth mentioning.
One other thing that was causing me problems is that I used to switch off my wireless LAN daily, getting the wireless the LAN to connect to everything the next day is a total pain. It was'nt a problem before I bought the iPronto.
So I don't turn the LAN off now and no more problems.

Steve.