[Paraview] Problems with threshold

[Giacomo Rossi]

I've a problem with threshold on paraview 3.2.3 on kubuntu 9.04 (kde 4.2.2, qt 4.5.0). I receive 
this error message when i hit threshold button:

"QFormBuilder was unable to create a custom widget of the class 'pqDoubleRangeWidget'; defaulting to 
base class 'QWidget'." 
"QFormBuilder was unable to create a custom widget of the class 'pqDoubleRangeWidget'; defaulting to 
base class 'QWidget'." 
QObject::connect: Cannot connect (null)::valueChanged(double) to 
pqThresholdPanel::lowerChanged(double)
QObject::connect: Cannot connect (null)::valueChanged(double) to 
pqThresholdPanel::upperChanged(double)


and I can't insert values into the upper and lower threshold of the threshold filter. I've to install 
qt 4.3.0? Or the problem is anything else?

Giacomo Rossi
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