It seems that getting library versions cordinated in Linux is difficult. Qt provides a mechanism for making sure that the required and correct libraries are installed in Windows and Macintosh, but they don’t make an installer mechanism for Linux. (There are many reasons why they don’t.)

Because of the issues involved in distributing QLogo binaries, I am removing Linux binaries from here. You can still download and compile the QLogo source yourself; it’s super easy.