Bug in 2.66 after metadata download

Hi,

after installing version 2.66 I discovered a strange behaviour.

After downloading metadata for a book entry one gets prompted in a dialog containing the results. On top of the dialog (below title and author) there are the links form the sources where metadata was found. In my example this is "Google", "Amazon.de" and the isbn.
In earlier versions a click on the link opens the corresponding website e.g. the book details page on amazon, google and so on.
In 2.66 clicking on the amazon link doesn't do anything. No website opens. Nothing at all happens.
When I use the context menu and copy the link and fill it in a browser window I can see the link is correct. If I use the context menu and click "open link" it also opens the link in this sort of internal browser view. But what I want and what happened in earlier versions: Open the Amazon link iin my browser...
As far as I see this happens only for Amazon. Google and ISBN links behave like before.
So is this a bug in this version or a feature?

Thank you in advance
KK