Thanks for your replies! But yikes, my original proposal was on a study examining lie-telling and moral contagion. Since I ended up going with a different supervisor, I'll be studying something totally different (association between comorbidity and suicide). In my interview with my new supervisor, she did say that this shouldn't be a problem and that in the case that I do get in with her, I'd just have to send something in notifying them of my changes. I guess I should probably ask her what to do about this now.