Well im getting some buzzing (sort of rattling as well) from my acoustic and its not fret buzz. It happens mainly on open strings but on fretted notes as well on the bottom E and A strings. It also sounds like its coming from the bridge. I assume this means something not in tight enough but everything feels tight.

Here's a picture of what type of bridge it is.

You can buy a new bridge, it's very cheap. It could be a nut as well. It's also cheap. Look for a 1mm taller one. Replacing is very easy.

This guitar is only about 3 month old are you sure im gonna have to replace the bridge, teh buzzing isnt very loud, just slightly annoying.

It could sometimes happen when you put new strings. Later the buzz dissapears. If you think this is not the issue then I can suggest nothing else than replacing the little white thing - the bridge. Because your guitar doesn't have a moveable bridge like electric guitar, there is nothing else you could do.

That might be the problem. I'll hope it is and see if it goes away soon.