bypass images directory

[eluser][email protected][/eluser]
Hey guys,

We just encountered an error that took us about 4 days to figure out. The problem was that our flash session data was all of the sudden disappearing.

The culprit was one missing image file being loaded through a CSS file. CI was looking for /images/closelabel.gif and couldn't find so it threw a 404 error in the background; while still displaying the correct page. Since we were using flash_data the 404 cleared out the session because it was a CI request.

So...what do you guys think the best way to resolve this would be ??
A) Somehow get CI to bypass /images/ directory when it is loading (not sure how to do this)
B) Not use flash_data
C) Have all your images exist at all times (not very predictable cause you can make a mistake)
D) any other suggestions????

thanks.