Vanishing Images in Firefox...
I was doing this for a site using the Yosemite theme, (see: http://j22sw.covertgame.com ) and transferred the content yesterday using Chrome. I went to move the DNS for the domain to point to the new site, and none of the images for the them show up in Firefox.
Any ideas where to start looking?
As always make sure to clear your browser cache on firefox.
This happens to me almost everytime that I move a C5 site from domain to domain. We usually develop a site in a sub-directory of a production domain that we own and then, when ready to launch, we'll install C5 in a new hosting account and, as you say, upload the theme, files and any blocks/packages etc to the new install.
First load of the pages (in any browser) usually displays with no images but I find that a quick 'Clear Cache' in the dashboard will usually bring them all back. Took me a while to figure this out and was re-editing all individual blocks to display the images!
Hope this works for you.....