First of all I want to thank Adobe for a splendid product. Thank you!
I have created a Swedish blog at http://jaggillar.nu/ and I've just started to optimize the pictures.
My question is - the header (the top picture) of jaggillar.nu, how can I make this a smaller PNG with the same perceived quality to the audience? The current setting is 64 colours and diether 51%. Which other optimizations do you suggest for smaller file size?
You already have it at a good filesize.
You are placing a 990x180px image in the HTML as 770x140px. That is wasteful. You should really size the image to 770x140 within Photoshop. You might shave a few kb from the filesize.
<img src="http://media.jaggillar.nu/2011/12/jaggillar_header.png" width="990" height="180" alt="">
<img src="http://media.jaggillar.nu/2011/12/jaggillar_header.png" width="495" height="90" alt="">
Wow. Thank you Marian, I didn't notice that. The page is supposed to be 990 wide. I'll fix that.