My unit locks up during the following situations: 1 - After I learn IR to the IPronto, you must give it some time (a few seconds - 10 minutes depending on how many codes you have learned) to process these codes. 2 - When I'm using the EPG, if I have the IPronto tune automatically to the program I have selected in the EPG, my unit locks up. I will post again if I run into any other problems.