Facebook Facepile Image Compression

I’m using the Facebook facepile script on my website ( http://developers.facebook.com/docs/reference/plugins/facepile/ ) which shows users that have liked my website.

When I run a webpagetest, under the image compression section, I see a few lines similar to below. Is there a way to fix this? I am using W3TC on my website if that helps.

FAILED - (3.2 KB, compressed = 1.9 KB - savings of 1.2 KB) - http://profile.ak.fbcdn.net/hprofile-ak-ash4/371310_100000503055825_1614144330_q.jpg
FAILED - (3.1 KB, compressed = 1.9 KB - savings of 1.2 KB) - http://profile.ak.fbcdn.net/hprofile-ak-ash4/370635_100000536225096_951735396_q.jpg
FAILED - (2.6 KB, compressed = 1.6 KB - savings of 1.0 KB) - http://profile.ak.fbcdn.net/hprofile-ak-ash4/187570_100000192951226_1981056432_q.jpg
FAILED - (2.6 KB, compressed = 1.6 KB - savings of 1.0 KB) -

It’s out of your control and all on Facebook to do so your best bet is to just ignore it if you can.