Repost from '06 board - Gown Preservation Question

I bought my wedding dress back in mid-November 2005 for the wedding in October 2006. Since it was a David's Bridal dress, I took it home that day and its in my closet as we speak.

Someone mentioned to me a few days ago at work that I really should have it preserved immediately (before alterations, etc) because it can yellow.

I didn't know this - is this true? My gown is ivory and would hate to have it discolor. I was going to have it preserved after the wedding and never thought about having to do this asap.

Your help is really appreciated - I'm starting to freak out a bit about this.

I've never heard of preserving it before wearing it - I thought once it is preserved it is boxed up.
I got my gown thru Netbride so I had to store it at my mom's for a couple of months -it was fine. Just leave it in a closet with the garment bag opened a quarter of the way.

I would also like to know about this, as my dress will be shipped to me in 6 weeks, and my wedidng is in September.
My dress is ivory too!

Thanks Ladies - I haven't been keeping the bag 1/4 of the way open. I'll start doing that.

And yes, it seemed strange to me but I don't know about these type of things. Someone telling me my dress can turn yellow scared me a bit.