I've got custom header on wroniegniazdo.wordpress.com It's dissapearing lately, althouhgt you said in http://en.forums.wordpress.com/topic.php?id=14269&page&replies=26#post-116045 that problem is solved.
Image is stored in "Uploads" but is not showing on page. Strange that other images stored in Uploads are showing on page.
Only solution I know is to upload image again. But this works for only day/two.
Now I uploaded it again but wouldn't like to do it every day :/
Please have a look at this again or explain me if I'm wrong.
(sorry for possible eng. mistakes)