Next version of IrfanView is released and it has improved Vista compatibility. Here is the main list of features in new version –
Improved Vista compatibility
New Properties->Video option: Use DirectShow for playing (good for MJPG AVIs)
New advanced batch option: Auto adjust colors
New EXIF dialog button: Show in Google Earth (if GPS data available)
There are many new plugins for this version. For complete list of features, you can visit History page.