I kept on getting access violation on emerge because I had 1.2.12 of sandbox when I needed 1.2.17.
Reopen with actual error messages and emerge --info output.
had the same problem, upgrading sandbox to 1.2.12 solved it. sandbox version: 1.2.11 here is the output from sandbox-media-sound_-_banshee-0.10.4-5722.log access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8 access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8 access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8 access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8 access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8 access_wr: /var/lib/cache/gstreamer-0.8 access_wr: /root/.gstreamer-0.8
*** Bug 127747 has been marked as a duplicate of this bug. ***