I got it to work on testing/sid with 3 packages gathered externally. I had all the right package versions in the repositories except for libcv2.1, libcvaux2.1 and libhighgui2.1. The repositories had 2.3 of those which the Panda3d 1.8 deb package didn’t accept. I downloaded them directly from a squeeze mirror and installed them with dpkg.
After that the Panda examples would only run on python2.6 until I adjusted my path within python with “sudo cp /usr/lib/python2.6/dist-packages/panda3d.pth /usr/lib/python2.7/dist-packages/panda3d.pth”.
Also I locked the 3 packages at that version so next system upgrade won’t break Panda3d.