hey
 
my giantbomb account is no longer registering my achievement points for xbox 360... any ideas why not? hasnt since 22nd of october!

Same here. I suspect it's because you need x-amount of achievements gained before it'll add them? Seems to be the case from what I've noticed.

i think this achievement bug has been addressed many times.. search around and you'll get the answer 
 
dont care about the assholes who will tell you that this is old news or that you posted the issue on the wrong board or in a non-informative way. fuck those stupid perfectionalists 

This is covered by the stickied thread right at the top of the forums, guys.  The one called "XBOX Achievements."

As skrutop has already said, there is a stickied thread at the top of the forums explaining the situation.