Created attachment 419 [details]
Demonstration application using QComboBox

Overview:
When using new-style connections (object.signal.connect(target)) on signals
that are overloaded, you will sometimes receive the wrong data type in a
connected Python slot function.

Steps to Reproduce:
Attached is a sample application that demonstrates the issue using
QComboBox.currentIndexChanged which has 2 overloads, one which takes an int
argument and one which takes a QString.
The test runs 2 tests, one with old-style connections and one with new-style.
It can also take 'pyqt' as a parameter in order to run the tests with PyQt4
instead of PySide:

    python2 connect_types_issue_combobox.py pyqt

Actual Results:
When running with PySide, the new-style test gets a unicode argument instead of
an integer, like all of the other tests do.

Expected Results:
All tests should get integer arguments.

Release & Platform:
PySide 1.0.6.1
ArchLinux, fully updated as of a week ago (rolling release)