So I just updated to MacOS X 10.10 Yosemite. Why does DVDTalk think my Safari 8 browser is a phone? I get the mobile site on my desktop. I don't see a "Full Site" link either.

Hello? Can you tweak the browser discovery?

that's odd. did you check if you inadvertently changed the user agent? Go to safari preferences --> advanced --> check the box for enable developer menu.

Then in the developer menu, click User Agent, and see if it happens to have one of the mobile useragents selected.

We are looking to fix this or give an option to turn it off altogether.

If you are using a proxy or wireless hotspot, it probably won't change though.