i see a few people have had this problem but i can not seem to find an answer as they are talking about apps.
i am using an up to date Lumia 800.
I am not using the facebook app, instead using the intergration to try and get the full nokia experience.
Chat works fine - but only connects over wifi. can it be turned on over network? (data usage isnt an issue)
I an see updates, comments, photos, newsfeeds, everything.....
except when someone sends me a message (not in online chat)
So if i am not online over wifi, or they just send me a message not a chat. as far as i can tell i can not see this without either getting the app or going to the mobile site.
have i missed a push feture somewhere or is this a development oversight 
thank you for your help 