Safari displays blank pages for some sites

OS X Yosemite 10.10.1 Safari Version 8.0.2 (10600.2.5)

Some pages, sometimes on Apple's on support site simply display as blank pages. The same page displays perfectly on Firefox or Chrome. What is this strange behaviour? For example, this link: http://ift.tt/1BTY7WN shows a completely blank page. See: http://ift.tt/1yRvNGV

The same site displays without problem in Firefox. (Can't post image due to low reputation.)

I have no extensions installed in Safari. JS is enabled, all settings are default. This is a fresh install of Yosemite.

What's going on. Any pointers will be appreciated. Thanks.