Umm.. then why do you use big icons everywhere, and small ones only in the sync dialog?
Oh, now I see, you use then in the manifest window too. I suppose the icons should be same every where. Or at least be the same size in the separate dialog windows (I just cant see the difference between the icons when they are so small). Moreover, why do you make "shelve util" to be a link, and not a button?:)
I suppose we should just read some UI guidelines. Smth like this at least http://msdn.microsoft.com/en-us/library/aa511328.aspx
Going to read it an a couple of days