out-of-date v.1.13 -- LIB_DEPENDS reporting problem

[Josh Grosse <josh_(_at_)_jggimi_(_dot_)_homeip_(_dot_)_net>]

I've seen this odd report from the new out-of-date that I do not
understand.  Is this an error?  I had it start up some days ago, but, even 
after a complete re-sync of cvs and a rebuilding of my kernel, userland, and a
complete removal and rebuild of all my ports ... I can't seem
to stop this particular "outdated" message:
-------
	Collecting installed packages
	Collecting port versions: complete
	Collecting port signatures: complete
	Outdated ports:

	textproc/p5-XML-Parser         # expat.4.0 -> expat.5.0
-------
textproc/expat, the LIB_DEPENDS for p5-XML-Parser, is expat-1.95.6.
And textproc/p5-XML-Parser is p5-XML-Parser-2.34; make for the latter shows:
-------
	.... >> Checksum OK for XML-Parser-2.34.tar.gz. (sha1)
	===>  p5-XML-Parser-2.34 depends on: expat-* - found
	===>  Verifying specs: expat.2
	===>  found expat.5.0
	===>  Extracting for p5-XML-Parser-2.34....
-------
Any suggestions as to what might be the cause of the out-of-date error?