$ sudo dpkg -i opera_9.50-20071109.5-shared-qt_i386.deb
Selecting previously deselected package opera.
dpkg: considering removing opera-static in favour of opera ...
dpkg: yes, will remove opera-static in favour of opera.
(Reading database ... 175554 files and directories currently installed.)
Unpacking opera (from opera_9.50-20071109.5-shared-qt_i386.deb) ...
dpkg: dependency problems prevent configuration of opera:
 opera depends on libqt3c102-mt (>= 3:3.2.1); however:
  Package libqt3c102-mt is not installed.
 opera depends on libstdc++5; however:
  Package libstdc++5 is not installed.
dpkg: error processing opera (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 opera
aleksanteri@ubuntu:~/deb$