i am having exactly the same problem…i think…
i am updating the kubrick css – right now all i want to do is change the header image and background tile – easy things to do but….
i have uploaded both the new css and images – overiding old files via my ftp client but the site is still pulling the old items and wont even find the image when you enter the full URL – all i get is a 404 for that page.
not sure WTF is going on! any ideas anyone?