Comment 9 for bug 768616

I did a fresh install of Ubuntu 11.04, and the shadows appeared as required.

I then installed the patched nautilus (nautilus elementary) from https://launchpad.net/~am-monkeyd/+archive/nautilus-elementary-ppa. After restarting my session, the right-click shadow disappeared.

On using ppa-purge on the ppa mentioned above, the right-click dropshadow returned.

I guess that it was nautilus elementary that caused the problem. If someone else can confirm this, I think this bug can be closed, as nautilus elementary is not being maintained, as far as I know.