When pasting text through the Qubes Clipboard, I noticed the emdash character 
(—) is silently removed.

Reproduction:

Copy this text, paste it elsewhere in SAME AppVM (so no Qubes Clipboard 
involvement): One — two three.

It should paste fine.

Copy the same text to the Qubes Clipboard (Control-C Control-Shift-C), paste 
into same program in DIFFERENT AppVM with Control-Shift-V Control-V.

Expected: Text is same

Seen: Text is mangled, no more "—".

Now, Joanna of the Qubes team has written that Qubes only uses the passive X11 
clipboard with no "rich text" 
(https://groups.google.com/forum/#!msg/qubes-devel/fgjEKCOnM7E/zciO65Vm_lcJ). 
But this is still just plain text, albeit utf-8, it should work fine in passive 
mode. From what I can tell googling around, X11 clipboard supports utf8/Unicode 
so even if emdash is non ASCII shouldn't it still be supported? Is there some 
security risk to pasting unicode text, or is this a bug?

Thanks for any insights.

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