Yosemite - Can't add text note at arbitrary position in Preview?

My formal answer to the question: Don't use Preview.app for anything beyond viewing simple PDF documents. In particular don't use Preview.app when you intend to save the document.

The obvious (and better) choice is Adobe Reader XI, which does at least not destroy a document when saving it.

Well Adobe Reader's slow page scrolling is simply unbearable. In the end I decided to use Skim, which a lot of people seem to be using as default PDF viewer on OS X already. I'll only use Adobe Reader if I'm dealing with very important/complicated document, or if I want to change the background color of the document when I read.

EDIT April 2017: Now that Adobe Reader's efficiency seems to have been improved considerably, I just switched to it instead.