When I upload images via the standard media uploader I notice that it upload the original images with the same name but creates other cropped copies of the original one and rename them with originalname-150x150 or -340-120 and so on. I double checked the Media tab in the admin panel, but there are only dimensions for small, medium and large images and aren't the same which wordpress rename the files! And in the most of the case they are more than 3! So, how to configure this? I think that the problem was the custom theme that I'm using but it's not, I changed to default one.
Another question, If wordpress makes all this cropping with my uploaded images...how to use them in the php code? There are any function that I can call for getting all this images in different sizes? Thanks