TARGET with spaces behavior changed since Qt 4.6.3

If the project's PRO file looks like this:

TEMPLATE = app
TARGET = "The Application"

On Qt 4.6.3, running "qmake" generates two package files: The_Application_template.pkg (for the application) and The_Application_installer.pkg (for the smart installer). Running "make sis" after compiling generates "the_application.sis".

On Qt 4.7.0 RC1, running "qmake" generates three package files: The Application_template.pkg, The Application_installer.pkg, and The Application_stub.pkg. The files have spaces in them instead of underscores which causes a problem when, after compiling, running "make sis". It doesn't generate a SIS file, instead the tool generates the error:
Error: Package description file 'The' does not exist!

It would be good if the behavior was consistent with Qt 4.6.3 to allow spaces in the TARGET name.