A PNG image file can contain gamma information, that makes it look weird on IE.
To remove extra information from a PNG file and compress it, download the file below, and extract it to C:\Programs\PNGCrush.
(You may extract it to a different location but you must also change the path in the .bat file)
Then add it to Explorer shell context menu:
- On Windows Explorer, go to Tools - Folder Options
- Go to File Types tab
- Find PNG
- Click Advanced
- Create a new action:
Application: "C:\Programs\PNGCrush\crush.bat" "%1"
- Now you can right click a PNG file and select Crush
Note: crush.bat overwrites your PNG file. If you want to be safe, make a backup before crushing it.