Hi all,
Thank you all for your inputs. I could solve the problem just by installing
gnome-desktop. I tried re-installing libreoffice. With ubuntu unity, ubuntu
2D. The problem persists.
I installed gnome-desktop and now i am able to use the office or
highlighting or font changes without any problem. I could conclude that it
is the problem with the desktop (for a reason that i dnt understand) and
not the libreoffice.
Bala