Since it's presumably a WAV file you're getting from the rip, have you even tried playing it?

I saw this problem on a Linux box years ago, but I don't remember details.

I've seen cdparanoia rip very slowly on a single track sometimes, not always the last.

I didn't know cdparanoia was available for FreeBSD. I wonder if it's as hackish as my Solaris cdparanoia port, that works fine but I haven't maintained in like 3 or 4 years.