Thanks for your bug report, but after check your example, I found some mistakes
on it.

First:

this line:
self.slider.valueChanged.connect(self.valueChanged(int))

the correct way to use connect funcion is:
self.slider.valueChanged.connect(self.valueChanged)

but your current class class LCDRange(QtGui.QWidget) does not provide any
valueChand function, then you need create one:

def valueChanged(self, val):
     print "value changed:", val

this will make your example work.

if you want declare a signal on your class use the @Signal decorator.

@QtCore.Signal(int)
def valueChanged(self, val):
     print "value changed:", val

Created attachment 212 [details]
signal -> singal connection example

This is a small example showing the signal -> signal connection working.

marking as invalid

released on beta3

Created attachment 215 [details]
example using the signal to signal syntax and @QtCore.Signal syntax

I tried following the changes you suggested, and I was able to get the
'self.slider.valueChanged.connect(self.valueChanged)' to work with a regular
valueChanged function definition as you described in the first part, but could
not get the @QtCore.Signal(int) decoration to work.  The console gives a
'TypeError: native Qt signal is not callable' traceback.