If you want Mozilla (and probably Firebird) to crash, click here! If not, don't click! IE users can click. Nothing happens for them, but IE doesn't display the images because it doesn't have support for them. (Like Mozilla now since it removed support...)
This is because of Bug 196670.
Have fun.

EDIT: It's the MNG image that makes it crash...
Archived topic from Iceteks, old topic ID:1457, old post ID:12408