It's impossible for THAT cracked part to bear weight. A weight bearing stud will have material directly on top of it, thereby bearing the weight. From those pics, the only cracked portion I notice is just the trim.
Picture 005 further justifies this since the load bearing material is the vertical pieces, not the trim on the top or bottom. They just add that material so you don't notice joints, and so it makes it look "beefier". If you're concerned about it still, contact your manufacturer and request that they look at your pictures.
I suspect that the particle board warped a bit from moisture or heat, and the joint widened. Particle board is notorious for this... and is another reason why I won't buy it. I wouldn't worry about it too much, unless you can send other pics with different angles of the close-up "crack"
EDIT: Also, if you take a close look at the first picture, you will notice that the molding wraps around the bottom corner. They do this so that it appears "seamless" when looking at it from the top and front. All they have to do is cut the material in a "V" shape, so that when the material wraps around, the front laminate wood grain looking piece remains intact, making it look like a bent piece of hardwood. Looking at this more closely leads me to further believe that you're still in fine shape.
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