I finally managed to get the footer at the very bottom - viewport stuff. There is a good article on that at Listapart.

However, now I have a problem with bacground image not going all the way down. This is the page: http://www.logsol.lt/lt/kompanija/test5.shtml

Note, that there are different min-max width settings, so, the bacground simply can't be put on body element and centered. It has to be on content div i think. When I try to make it 100%, then it puts the footer too low. I wish there woudl be something like "height: 100%-16px".