I have reported issue to Gigablue. It seems they have a problem dealing with 8bit images. This includes the default_picon in images. Convert to 32 bit and they are fine.
May I take the opportunity to remind people ViX has function to use a separate picon folder for LCD picons. They can be placed in a folder caller piconlcd
Menu > Setup > Front Panel Display > Settings > Use separate picon pack for front display