Now that qt 4.4 will be splitted up in various packages I couldn't find a package that installs the files coming with the doc use flag in version 4.3. IMO those files should get installed with qt-assistant. Fact is that qt-assistant in its current form is pretty useless. (i.e. its just popping up a window saying that it cannot find /usr/share/doc/qt-4.4.0_rc1/html/assistant.dcf)
Created attachment 145138 [details, diff] proposed patch
Fixed in beta1, thanks.