PNG is quite popular and versatile format for web, but not so as we all want. Why? Because software cannot render, save and open it correctly. Only IE6 is worth to remember, I hope soon that wretched browser will stay in far-far past. Sometimes happens that PNG’s file size is quite heavy.

OK, lets begin our story. When you create a PNG files in Photoshop they seems to be quite large. “Why” you ask? I answer, because Adobe Photoshop (even CS3) don’t know how to save PNG format correctly (strange, but Adobe Fireworks does). Ok, lets see why Photoshop saves PNG images incorrectly.