Not strictly related but this has happened to me on one 'Blackbean's' bike games sbk'09 i think. I can clearly remember doing a whole bunch of trophies as stated in the appropiate guide and.......nothing f**k it i thought thats it. Turned on the ps3 next morning and 7 trophies popped in a row which was/is a record for me.
Thanks to Esyld for the awesome sig
Play for fun and the trophies will come