Its an unfortunate known bug thats not fixed for long. Only workaround is to launch Terminal and run "env UBUNTU_MENUPROXY= acroread" to launch the program in some type of menu compatibility mode. You gotta use this command everytime launching Reader if you need to use the menu options. Its a pain.
Glad to help. Cheers from Chandigarh.
Found an option to make the workaround permanent.
Paste this "cd /etc/X11/Xsession.d" (no quotes).
A edit file would open separately.
Paste this "export UBUNTU_MENUPROXY="acroread":$UBUNTU_MENUPROXY" in the Editor window.
Save the File.
Do a fresh Login.
The menu option would appear below the Taskbar but would be working.
Tested in Ubuntu 11.10 with Reader 9.4.7
The most simple solution for Ubuntu that i find is this :
In terminal paste the following :
sudo gedit /usr/share/applications/AdobeReader.desktop
Exec=env UBUNTU_MENUPROXY= acroread
Works great with searching adobe in unity and opening, and for opening a file from within nautilus
Thank you very much for this excellent solution - which worked like magic for me running Ubuntu 13.10. I would never have worked it out for myself. I needed to install Adobe Reader because the built-in pdf reader in Ubuntu did not seem to allow copy and paste of text selections, which I need for OCR purposes.