Exercise caution when using images as backgrounds for Web pages as they can reduce readability.
Background and text colour combinations should also be used with care.
e.g. grey text over dark, detailed background image
http://www.arts.monash.edu.au/bioethics/
http://www.maths.monash.edu.au/astro/
e.g. poor contrast between background colour and text
http://www.winsoft.net.au/~lskaife/links/links.html
