In the udm-custom.js file, try removing the "menu-indicator" images...
change
Code:
"down-green.gif",// menu indicator character/image ["text"|"image.gif"|"none"]
"down-red.gif",// menu indicator rollover image ["image.gif"|"none"] (only when using image arrows)
"0", // clipping width of indicator image ["n" pixels] (only when using image arrows)
"", // alt text of indicator image ["text"] (only when using image arrows)
to this
Code:
"none",// menu indicator character/image ["text"|"image.gif"|"none"]
"none",// menu indicator rollover image ["image.gif"|"none"] (only when using image arrows)
"0", // clipping width of indicator image ["n" pixels] (only when using image arrows)
"", // alt text of indicator image ["text"] (only when using image arrows)