I notice there appear to be some copy-paste enhancements in 7.1, with various smart kinds of actions (import) when pasting code; I hadn't noticed these when I was running 7.0.1. I'm now running 7.1 RC 1.
But twice this morning I've had the experience of attempting to copy something from OpenOffice into a source file (a string literal) and having NetBeans simply refuse to paste it: it pastes something else, from a previous inside-NetBeans copy.
If I close NetBeans and re-open it, I can paste the text fragment from OpenOffice.
I'm sorry I don't have a better reproduction scenario, at least yet -- but if it keeps happening, I'll try to notice patterns.
*** This bug has been marked as a duplicate of bug 205697 ***