[Anton]

Well, i'm not so deep into the camera thingie(I've got it working, though) but since everything you did sounds right, i'd advice you to try it with a regular pc- not a laptop(the pictures you included say something about a laptop). It might change nothing, but surely it won't do any harm, and I just don't beleive laptops. never :}
also, there is a thread somewhere that said that you can't grab a frame with 600*800 pix. resolution, which is often a maximum for a laptop (i beleive it is, but then i'm not really up-to-date with computer stuff) I didn't try this though, so pay attention that it's only assumptions.

to test the camera itself you could write a piece of code to move the servos around, you don't need calibrating for this.