Changes to a copy of a dupliframed object also change origin

I have a Nurbs Circle that I dupliframed by moving it and using the IKEY. Then I made a duplicate (not a linked duplicate) with <shift>-D, used M to move the duplicate to another layer, and edited the duplicated object to add more dupliframes. The original object gets the same changes as the duplicated object. How do I stop this behavior?

Shift+D still links IPO (animation) data by default.

To unlink the animation, press Shift+F6 to bring up the IPO window, and click the [2] in the header next to the ipo block name.

To make it duplicate IPO data by default, start an empty scene, drag down the frame just under the menu bar to show the preferences panel. Click Edit Methods and turn on IPO on the right. Drag up the panel and press Ctrl+U.
Note: if you do this with objects in the scene they will get saved to the default settings too!

Right on. Thank you. 8)