I'm responding here to a bug report because I think it's more of a support issue.

We are currently customising our OPAC page and notice that Koha requires images to be stored at an https: address. Please could you advise how and where I should upload these images so that they can be displayed on our OPAC?

Koha doesn't require that your images be stored anywhere in particular. However if your Koha catalog runs over https and your images are hosted at a non-https location, the user's browser might give them "mixed content" warnings. I'm guessing this is what you're seeing? If you don't have the ability to upload your images to a location somewhere on your domain where they can be accessed via https perhaps you could ask your Koha support provider to place the images on the same server as Koha? -- Owen -- Web Developer Athens County Public Libraries http://www.myacpl.org