The channel preview window was a much-desired feature from many users, and has been there for some time.drewba said:
There are several codes in the setup to turn off the scroll effects, hide the SD channels in the guide, and other things....you may want to go through the setup menu and see if any preferences need to be changes.
The user UI is not intented to emulate the Tivo UI (and in fact, some of us are very glad it doesn't, as we do not care for the Tivo version).
Everyone seems to have slightly different tastes when it comes to the User Interface. Some like the Tivo version, some hate it.
In any case, there are other threads here regarding the User Interface that can help guide you through the various options, and you also can reference this thread for details as well - the first post there is very helpful:
http://www.dbstalk.com/showthread.php?t=72648