I am a website designer. I have on my computer Linux's Krusader file manager, with which I am able to copy files to my web host's server. Normally, when I do this, the page appearing on Firefox accurately reflects a change I have made and copied to the web host's server. Lately, the page showing on Firefox is only the old page, without the change; and my clearing the cache, exiting Firefox and coming back in has made no difference.