I get the same error but it says: Background_popup_landscape.png" or "Background_header_landscape.png. The trouble I am having, and I do not know if it is related is that my Vz Navigator and Visual voice mail do not load properly. They only partially load on less than 1/2 the screen and a blue screen of death is in the background. They only come up in portrate and before it loads the Suretype keyboard comes up then dissappears. Has anyone heard of that happening.
I want to down load a new zen theme to see if that fixes it but i haven't figured out how to do it yet.