I am using Windows Vista.
I was just visiting a website and found some "missing" images boxes on webpages. And, I could see this for many of the websites I visited. Then I realised that only a certain type of image files are not being displayed, which is PNG. I restarted my computer and noticed that 2 of the sidebar gadgets were missing background images.
The websites with "missing" images are working fine in Firefox though. So its a problem related to IE and some of the Windows files.
Any ideas how do I get PNGs working in my IE and Sidebar etc.