Topic: Photos not loading

Ok, i'm REALLY confused by this problem with PostCardViewer ('our work' page).

http://www.simplyflowers.biz/ourwork/

All i've done is uploaded the files to the site hosting, yet it doesn't appear to load the images now. I've tested it on two machines (Mac and PC), and the Mac won't show it in FF, but will in Safari, and the PC won't show it in FF or IE! I've deleted and reuploaded, and even tried the example for the PostCardViewer site!

Anyone got any ideas? as this is strange.