Comment 38 for bug 1235918

Yes, the issue is still present in Wine 1.7.35. It is worth noting that not all websites are affected. See the bug report https://bugs.launchpad.net/pipelight/+bug/1235918 for more information. There are no technical problems to fix this bug, but it is a legal problem.

The Software Freedom Conservancy initially planned to take a look, but then after half a year changed their mind because this is a Pipelight issue, and "Pipelight is not a conservancy member". They can't help us with this "Pipelight-specific code" we're proposing to research and write. (Don't get confused by this answer, it is indeed a Wine bug, to be more precise the missing COPP implementation. No reactions on our attempts to explain the situation.) We contacted other organizations but didn't receive any clear answer so far, so we can't proceed with fixing this issue.
[ see https://bugs.launchpad.net/pipelight/+bug/1235918/comments/26 ]

If someone can help to ensure that the legal situation allows implementing this stuff, then we'll continue working on it. Otherwise (and much more likely) this bug will stay open forever. The bug should probably be renamed to describe the problem a bit better though:

Silverlight 5.x can't individualize on some websites (missing implementation for Certified Output Protection Protocol interface)