|As Clubjuggle said, first try a forced resfresh.
If it wasn;t your cache wrong (which you said you've cleared) it sounds like something wrong in a proxy (probably owned by your ISP).
A forced refresh "should" tell the proxy to download the file again.
to do the refresh (if you don't know how) hold down Ctrl key and push F5 (applies to IE/Firefox/Mozilla/Opera)
in the case that it doesn't fix it, it may be a badly set up proxy, and still be fetching the file from a daughter/sibling proxy under forced refresh.
eitherway, if it is proxy, they usually only have a couple days retention, so it shouldn't last long eitherway,