I've set my program preferences to only copy the selected text, not reference information. This usually works fine for me, except I've notice an anomaly.
If I copy using control-C in my NIV 2011 it gives just the bible text as expected, but if I copy using right-click and select "Copy" from the menu, I get the verse reference followed by the bible text.
For the other Bibles I tried (ESV, NRSV, REB), both copy methods give the correct results - bible text only.
Why should NIV 2011 be different?