I have no problems at all. Not with Classilla, not with iCab, even not with IE 5.1 .
No idea whats wrong at your browsers, but I checked it right now again.
And yes the Archive does not store all files, but at pages that were up several years the chance is in existance, that there were the files stored once. But you have to check every archived page, one by one (what can be extremely annoying if there are 50 up, ...