This is happening on almost every link posted within threads here on MacRumors... Safari has no extensions installed except the Downie downloader extension.
I get the following eror page:
Safari can't open the page "(big long cryptic url)" because the page's address isn't valid.

If I open the MR page in Google Chrome or Duck, Duck Go browsers, the links open as expected.
I get the following eror page:
Safari can't open the page "(big long cryptic url)" because the page's address isn't valid.

If I open the MR page in Google Chrome or Duck, Duck Go browsers, the links open as expected.