nman@ndesk:~$ sudo dpkg -i opera_9.10-20061214.6-shared-qt_en_i386.deb
dpkg: error processing opera_9.10-20061214.6-shared-qt_en_i386.deb (--install):
 package architecture (i386) does not match system (amd64)
Errors were encountered while processing:
 opera_9.10-20061214.6-shared-qt_en_i386.deb