We've got a little problem with outer Sharepoint 2010 RTM Server.

Some user couldn't Copy Data in the Site Content.

It's only a Problem in this Webpart/Control. Links or something else can be
copied without any problems.

I think this is a lokal IE Settings Problem, because outer User can copy the
data with the same user credentials.

Is there a special permission or setting in IE for copy data from the site
content?
The ribbion Copy & Cut is also deactivieted.