I have a Tivo Series 1 made my Phillips that came with Tivo version 2.5 and later updated to Tivo version 3.0. I have helped blessed additional drive space on several Tivos and know from looking at the files that Tivo uses the same standard timezone files that every other linux distribution uses. When it dials up for updated guide information, it syncs it's clock using a standard method known as NTP (Network Time Protocol) which transmits the time in GMT (Greenwich Mean Time). With NTP, it is up to the software getting the time to translate the GMT time to the correct local time. That means that NTP by itself will never correct for changes in DST (Daylist Saving Time) as will occur in the US on March 11. After talking to Tivo support, I got the following answers about when/if the time zone files will ever be updated: "It will correct the time automatically when it gets guide information." - Wrong! Tivo update time using NTP which is given in GMT. Changes in local time offsets require changing the zone files on the tivo itself. "Just go through guided setup if the Tivo to correct the daylight savings time setting" - Wrong! Going through the guided setup will not update the local zone files. It might be possible to use guided setup to set the Tivo incorrectly to a time zone that is one hour ahead but such a work-around requires remembering to go through the guided setup *FOUR* times a year for something that the Tivo should be doing itself. "You need to call Phillips for support" - Wrong! The user manual that comes with the Series 1 clearly states that Phillips only provided support for the *hardware* and the software support is Tivo's responsiblity. The battery which helps the tivo keep track of time even when it is unplugged is still working and there are no other indications of hardware issues. Updates to the time zone files for supporting the Energy Act of 2005 is a *software* issue. "How long have you had that Tivo? We do not support it anymore -- it is not going to happen." - Bad answer! There is nothing in the user manual about when support ends. There has been information from Tivo that with the "lifetime" subscription there will be free updates including fixes. It has been explained that "lifetime" is defined to be while the unit is still functioning. It appears that Tivo does not actually support the tivo software during the full lifetime of the unit. Given this premature dropping of support with Tivo products, I can no longer advocate users to choose Tivo over other DVR solutions.