Apparently when they start working on processing your application, the certification/submission button changes to a "change notification button." Presumably the new button allows you to notify them of changes in your contact information. Anyway, this is my understanding from discussions in this forum. I haven't had the good fortune to get the button yet.
Damn! A whole month earlier than me! It took them almost 8 weeks to process your app! Did you have any complications like lost transcripts or credit card problems?
No problems whatsoever, SMW - this has been my point this whole time, that AMCAS is processing applications on a priority schedule that I have yet to figure out.