I was able to reproduce this issue in Gmail. While reading a message I tried to click on "Reply" or "Forward" using the R-click, 3rd "middle" button, and Ctrl-Click to open the link in a new Tab.
Results:
Right-Click- gets you the contextual window you get when you Right-click anywhere. The menu with the "Back" and "Reload" options.
Middle-Click- does nothing.
Ctrl-Click- opens the window in the same tab.
Ubuntu 8.10
firefox 3.0.3
I was able to reproduce this issue in Gmail. While reading a message I tried to click on "Reply" or "Forward" using the R-click, 3rd "middle" button, and Ctrl-Click to open the link in a new Tab.
Results:
Right-Click- gets you the contextual window you get when you Right-click anywhere. The menu with the "Back" and "Reload" options.
Middle-Click- does nothing.
Ctrl-Click- opens the window in the same tab.