my new mp4 player also has 3.5.37
what i noticed different from 3.5.35 of my other player was that my new player had the option to change between three themes. i dont know how to make the third theme work but i have loaded ipod theme by rolleyflex and vista theme by tadad and they both work on my player.
i now have the choice to interchange between them by using a option in the settings called Display Style
