When I input the https URL for the homepage of my MOSS 2007 site, I'm challenged for username/password credentials. I put in my info and I'm able to access all pages without being prompted again for credentials except for one.
The page in question uses a standard, site definition default.aspx and sp template, and contains a single web part, a document library.
Once I'm logged into the moss site at the home page, no other page prompts me for username/password.
However, when I turn images off, there's no prompt for username/password on this specific page.
Also, when I click the title of the document library and arrive at the AllItems.aspx page, there is no prompt, with or without images.
Also, if at the pemissions prompt I click CANCEL and do not re-input my username/password, I see no images missing, nor any loss of functionality.
I have checked the page in SP Designer and find no links to images outside of the site (which caused me grief some time ago as the https gave 'mixed mode' warnings.)