I upgraded to Mac OS X 10.7 on Saturday, and have been restoring some of my applications that I build from source, when I noticed that the man pages are failing to render the command line flags correctly, as you can see in the image below.
Unfortunately, I can't guarantee when this started to happen, but since install I've only built ffmpeg, x264, nmap, libpcap and tcpdump from source.
I also can't actually guarantee that the man pages were intact when I first installed the OS. It looks like they're intact when I view them in Vim though, as you can see in this other screenshot of the same man file.
So, why are my man pages broken?