Constructive comments include details, besides vague adjectives.

Your only two comments on HN are about beautyprofile. Are you involved with it? Not a good way to get PR then.

http://news.ycombinator.com/threads?id=huytoan

I like how you renamed your app to http://apps.facebook.com/profilecollage/ and made your old app URL redirect there. It's very professional of you.