http://i.stack.imgur.com/z8yEP.png <- screenshot for this question (not enough reputation)
I am using fixed position images as seen at css-tricks.com/examples/BlurryBackgroundEffect/ to create a glassy effect to a web project I'm working on. As you can see on the screenshot above often the content block image fails to display until the browser is forced to make a redraw by scrolling etc.
I've tried preloading them, using both onload and hidden img tags separately, but it still happens.
This is not a massive issue but if anyone understands why this occurs it would be really helpful.