This bug is regressed in FF 4.0.1 on Xubuntu 11.04. (It was also regressed in the FF packaged for Xubuntu 10.10.) Steps to reproduce are identical to comment #103 from 2008.
If an image is a link and is near the right side of the screen, its context menu will be drawn under the cursor, 100% reproducible. If the right mouse button is quickly clicked and released, the user will never see the menu drawn, and it will appear that a "random" item has been selected.
This bug is regressed in FF 4.0.1 on Xubuntu 11.04. (It was also regressed in the FF packaged for Xubuntu 10.10.) Steps to reproduce are identical to comment #103 from 2008.
If an image is a link and is near the right side of the screen, its context menu will be drawn under the cursor, 100% reproducible. If the right mouse button is quickly clicked and released, the user will never see the menu drawn, and it will appear that a "random" item has been selected.
This only affects image links, not text links.