I own a 15.4" Macbook Pro, and I have noticed some slight bulging on the sides. It is occurring on the left front side, and one the left side near the bottom. Here are some pictures of it:
Is this something I should be worried about, and is there something I can do to fix it?
The obvious questions are:
1) Did you drop it?
2) Do you rest heavy objects on it?
3) Did you smash it with a blunt object at anytime in a drunk stupor?
Yes, it is something to worry about, you used imageshack to upload the pictures
On a more serious note, someone made a thread about this recently and they got the entire case replaces for free in AppleCare of course. Best bet is to take it into your Apple Store's Genius Bar and see what they have to say.