Selecting previously deselected package opera. (Reading database ... 46581 files and directories currently installed.) Unpacking opera (from opera_static-9.50-1983.gcc4-qt4_i386.deb) ... dpkg: dependency problems prevent configuration of opera: opera depends on libqt3-mt (>= 3:3.2.1); however: Package libqt3-mt is not installed. dpkg: error processing opera (--install): dependency problems - leaving unconfigured Errors were encountered while processing: opera