I have a problem with the default theme twenty ten. I want to change the header image. I've googled a bit and realised that I am not the only one experiencing problem but I haven't found the solution.
So far I've tried:
1) Dashboard -> appearence -> header -> upload image.
No matter the size or name of the picture, it always appear blank (or rather a grey rectangle). I've tried with header images that work on another site (using atahualpa theme).
I've tried upload from firefox and IE. I've also tried to look at the site usuing firefox and IE. (no picture).
2) I deleated all default pictures in the header image folder in twenty ten theme folder. I then uploaded a couple of my owns. In the exact right size. Nothing changed.
3) I installed the wp plug-in twenty ten header rotated. Nothing changed.
Any ideas greatly appreciated.
This is the site in question: