I am having problems with this also.  Using your website   

When I try to paste using the context menu I get a dialog that says///

 

"Do you want to allow this webpage to access your Clipboard?"

If I select Allow Access the dialog goes away,and it does not paste the first time,  I have to right click and paste a second time.  This is on a machine running XP Pro and IE8.  The same machine using FireFox works correctly.

 

If I use a machine running Windows 7 and IE9 I do not get the message but I still have to paste it twice.

 

Any thoughts?