"phonon.dll" gets built by Qt with a lowercase 'p'.

That's the standard on all out platforms since a few versions. But s60installs.pro handles that file as "Phonon.dll" with an uppercase 'P'. That's why the final installed dll has another file name than the built dll. We seem to be conformant with all the other file names. I believe that this is simply a cosmetic issue, thus low priority.