FreeBSD10: lock order reversal with portsnap extract

[Walter Hurry]

I'm installing FreeBSD10 (head; snapshot from 30 May 2013) into a VM.

One of the first things I do is a 'portsnap fetch extract'. As soon as 
the extract starts it produces a 'lock order reversal' message with a KDB 
stack backtrace, but then proceeds successfully to verify the integrity 
and install the ports tree.

Should I worry?