From the developers:
Willehond - the problem with the large images not displaying was an IE6 issue which is now fixed.
letrinus emmer - thanks for the note on the spelling of triathlon.... we fixed this in the drop down menu for technology and the content page itself.
Napalm - we haven't experienced any problems with the large banner image in Firefox, it may have just been your connection at the time.
narra - your question about the CMS we're using.... we built the website from the ground up - written in PHP using a MySQL database. There was no pre-existing software.