I have this png header image with transparency that is quite large 2500x1236, but only 343KB. I don't need or want it that big, so I throw it in PS and crop it down to 1666x444 and save for web, png24 tranparency, and the new, much smaller image, comes out of Ps at 585KB. WTH? How could the file size nearly double when it should be cut nearly in half?
Is this a Ps quirk? Should I just always use a png optimizer like pngOut?