I've also seen these messages when I did a fresh install of LWP recently after configuring a new machine. I consider them worrysome, but the author is aware of them (I think-- I'm pretty sure I reported them, plus almost everything in CPAN goes through CPANTS anymore, and they always e-mail me when one of my modules burps). I've opted to force installation more out of laziness and lack of enough time to investigate more closely.

--rjray