The first error is the JPEG texture file. For some odd reason, Maya doesn't react well with .jpg files as textures. Try converting it to a .tga (targa) and create a new texture node for that piece.
The second one.. mmmmmm... No clue.
Anyone?
Dave Baer
Professor of Digital Arts
Digital Media Arts College
Boca Raton, Florida
dbaer@dmac.edu