Update: 19/07/2011 I looked at our Error log for the server. Very strange my finding - perhaps a BUG with the: Back Office > Preferences > Image > Regenerate thumbnails Utility When I ran this command, it seems to have deleted the "admin" folder in "root/img/" - because the log showed that the folder & images could not be found. So I checked the directory structure with a fresh install and the folder was missing from our existing install (and nobody deleted this manually!!). Fixed this by copying the folder over again. This is very strange - I've tried to replicate the issue but it doesnt seem to create the same result (deleting folders/images). I suspect that with whatever happened, it also deleted the images generated by prestashop for our product catalog (xxxx being the original image name): xxxx-small xxxx-medium xxxx-large xxxx-thickbox xxxx-category xxxx-home xxxx-large_scene xxxx-thumb_scene the original image "xxxx.jpg" exists in the folders. I think I'll have to reimport our images for our inventory... only fix