Errr, all fields!

Driver picture, sponsor pictures etc. Only once did I manage to get the driver picture updated (and this was the one time I did have a picture which was larger then 200x200 pix).
User picture

First Sponsor

As far as I can see there's nothing wrong with these pictures so...
Thanks for the help!
ps. just tried to upload from my Asus Transformer Tablet (Android). This gives a "Invalid file format" error. They are normal .jpg files as far as I can see so I don't know what's wrong.