Facebook "like" options removed by sh404SEF

HI Guys,

I have been using EasyBLOG on a number of sites for some time now and about 6 months ago started to use sh404SEF for the generation of SEF URL's.

All seemed fine but I have now noticed that with sh404SEF turned on the facebook "like" options do not display on either the latest blog page or the individual blog pages. If I turn off sh404SEF then they reappear.
All other social media linking buttons seem unaffected.

I am not sure if this has always been the case on whether I have just noticed it, but as I really like both extensions I would like to understand how to make them play nicely together!

Any insight would be appreciated...