Guide button only works for curent program (first push) . Second push should bring up full program menu, but instead it just goes back to tv show.

I had the same problem with my 37L and 42L Vizio TVs but my 26w vizio TV guide works perfectly. on 12/28/2009 I called vizio about the problem and they said that Vizio lost a law suit with a company (tech didn't tell me the company name) that said that Vizio did not own the "TVGUIDE" technology b/c the other company invented it first. So, Vizio was forced to turn this feature off in their new TV's so that's why my guide button with older Vizio 26" TV (bought in 2007) works and my newer 37" and 42" Vizio TV's (Bought in 2008) do not even though the instructions are still in their user manuals which the tech said will be removed in future user manuals.

Honestly,this sounds like correct operation.