PNGs have driven me crazy

In the past. Sometimes it seems like matching colors never quite works out right. I'll always have to tweak colors to get things to look right, or jpgs and gifs placed right next to pngs don't match. The same png would look different in two different browsers.

I found the answer to this problem. Photoshop saves extra meta information with 24-bit pngs (like gamma correction) which is applied differently by browsers. Here is an article all about it

http://www.polarbearlamps.net/2007/04/png_color_mismatch_on_the_web.html

and some useful info about the problem http://morris-photographics.com/photoshop/articles/png-gamma.html#remove