Same problem, 3.6.8 and previous recent versions. I never thought to try another browser but I just pasted into IE and it worked fine. I copied from Firefox to IE and it worked as well. It's just when you paste into Firefox that you get the weird line breaks.

I have experienced the same problem, though I didn't know it was specific to Firefox. But I have a work-around: Before you paste the source text into Facebook, paste it into a simple text editor like Notepad (on Windows) and THEN copy it again, and paste it into Facebook. That seemed to work for me (I've only tried it once).

Anonymous, Drew_Blood, please let me know if this works for you.

A little clarification: After you paste the source text into Notepad, you should highlight and copy it again from Notepad, not from the source. Then paste it into Facebook.

I find that even content typed directly on Facebook via Firefox can be subject to random line breaks. This being the case, copying and pasting from a text editor wouldn't solve the problem.

I use Firefox on both Mac and PC. I know the problem happens on Firefox for Mac, haven't ascertained whether it also happens on the PC side.

the easiest way to publish content from anywhere to FB is the Freeware-tool Click.to. Very powerful, fast and easy to use.