Same problem I have. New TSI6400 iPronto purchased two weeks ago (March, 2005). Uses v1.8.2 on unit and 2.5.2 on iProntoEdit. Will not awaken after a few hours of non-use. This is consistent (happens every time), and only reset or disconnect/reconnect battery wakens unit...very frustrating. Two emails to Philips with the results: "reset your unit." One call to Philips: "let me get you someone more experienced to call you back" and then nothing. Haven't even gotten to the point of trying to program and actually have it control my TV and cable.

I noticed most of the posts in 2003 and early 2004. Apparently even in 2005 this problem still exists.