Putting the brackets above the shelves

[ciphergoth]

We want to put some bookshelves above our living room window. We'd like to create as much space as possible and the brackets aren't very attractive, so we're thinking of mounting the brackets above the shelves instead of below.

I'm not sure, but I think this will reduce the amount of weight the shelf can carry before pulling the rawlplugs out of the masonary. I'm guessing that it won't reduce it so much that we have to worry, but does anyone know better?

Thanks!