As reported by Chad Outten in MDL-24642:

This relates to MDLQA-491.
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This test requires the following:

Portfolios and the Box.net, Flickr and Picasa portfolio plugins enabled for the site
A forum activity containing a post by a student with an image attached
Box.net, Flickr and Picasa accounts for use in testing

1. Login as the student and access the forum post.
2. Try exporting the post, selecting Box.net as the portfolio.
3. Check that both the post and attachment are exported correctly to Box.net.
4. Try exporting the attachment, selecting Flickr as the portfolio.
5. Check that the image is exported correctly to Flickr.
6. Try exporting the attachment again, selecting Picasa as the portfolio.
7. Check that the image is exported correctly to Picasa.
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Results

Steps 4-5 (Flickr): fail. upon authentication to flickr account, following pop-up dialogue displays and is not resolved by reselecting flickr repository via moodle.

"If parent window is on HTTPS, then we are not allowed to access window.opener object, so we cannot refresh the repository for you automatically, but we already got your session, just go back to file picker and select the repository again, it should work now".

Comments from Penny in MDL-24642:

I didn't write this plugin (Nico did) and I don't know anything about it ... I think we should maybe move this to contrib, I don't have time to learn about it in order to maintain it before 2.0 and Nico is gone Alternatively maybe whoever is maintaining the flickr repository plugin could do it?