SUMMARY I have a vertical panel on the right side of my desktop. Clicking "Show Alternatives" in the context menu does nothing but closing the context menu.
Works for me. Is your panel auto-hide, by any chance? Does it work with a vertical panel on the left side, or with a horizontal panel? Does it reproduce in a new user account if you immediately move the panel to the right side?
It's set to auto-hide, correct. I'll try and verify the other scenarios you mentioned this weekend.
I had a feeling. Duplicate of Bug 384758. *** This bug has been marked as a duplicate of bug 384758 ***