Terminal server with broken clipboard

Hi experts.

I upgraded a TS 2008 R2 to 2012 R2 (in 2 steps). All went right, all RemoteApps still work, but the clipboard lets us only transport text to and from the RemoteApps, no longer can we transport files via clipboard (Clients are still the same, win7/8.1 with latest RDP Clients)
I see no reason and the event log is clean, the Server is patched. Policies don't interfere.

Anyone seen and solved this before?
LVL 62
McKnifeAsked:
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Lee IngallsDirector of IT/TS, Quality and FinanceCommented:
Start Task Manager on the Terminal Server by pressing CTRL+SHIFT+ESC, and then verify that the Rdpclip.exe process is running. Note that by default, this process should start when you start your computer.
Start the Terminal Services Configuration snap-in from Administrative Tools.
Right-click the RDP-TCP Connection icon, and then click Properties.
Click the Permissions tab.
Click the Users icon (which represents normal users logging on to the Terminal Server), and then click Advanced.
Click Users, and then click View/Edit.
The Permission Entry for RDP-Tcp dialog box opens. Verify that the Virtual Channels entry has a check under the Allow column, and that the Deny column does not have a check. Click OK.
Click OK until all of the remaining dialog boxes are closed.

Reference: http://support.microsoft.com/kb/302443
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McKnifeAuthor Commented:
Sorry, without rdpclip.exe logically, no text transport would be possible , so yes, it is running.
About configuring the Terminal Services Configuration snap-in from Administrative Tools: this is not present in Server 2012, was last seen on 2008 R2.
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Lee IngallsDirector of IT/TS, Quality and FinanceCommented:
Apologies for jumping the gun... went through the same thing on 2008 r2.
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McKnifeAuthor Commented:
OK, self-solved: expected behavior, see http://social.technet.microsoft.com/Forums/en-US/winserver8gen/thread/9c4eae05-b477-4c2d-8743-56508e870128/#d0e15223-6495-47a8-84fd-d8391857c86e

2012 R2 has changed the game: no longer possible if drive redirection is denied.
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McKnifeAuthor Commented:
self-solved
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Windows Server 2012

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