.png and .jpg aren't responsible for flattening layers. Photoshop will do that before you pick the compression method.m4d_h4cker wrote:I don't understand why it's there for some computers, and not for others. I'm going to try making a .png instead, they don't flatten layers as much as .jpg's do. Yeah a better border will soon come.
If you want to get rid of picture artifacts (jaggies, as I call them), go to http://www.adobe.com and go to adobe Xchange, and in the photoshop search menu, type Artifact Remover. This should give you a selection of actions to remove artifacts.
If you want to do it the long way, select the image using the magic wand tool, in the select menu, pick modify>border (1px).
In filters, use the blur command to blur the outside edge. Make sure that the layer selected is the layer with the image on it!
Voila, no more jaggies!

