For reasons that don’t matter in the least I needed, yes, really and truly needed, to open a mediawiki-driven site in Safari and when I tried to do so, I was greeted by an unsightly error calling itself “NSURLErrorDomain: -1015″ that complained “cannot decode raw data”.
Ouch.
Searching Google, I found nothing useful except for this thread on the Apple support forums where amongst the dozens of rightfully irate screamers there were two that suggested gzip compression on the web server was to blame (well, not really to blame, of course. every single browser in the world is absolutely fine with gzip compression except for Safari, so by rights it’s Safari that’s to blame and not the compression, but you get the point).