[v1.8.2] TypeError - d:\OpenNumismat\open-numismat\OpenNumismat\EditCoinDialog\DetailsTabWidget.py:857

OpenNumismat: 1.8.2
OS: Windows 7 (6.1.7601)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: it

Traceback (most recent call last):
File "d:\OpenNumismat\open-numismat\OpenNumismat\EditCoinDialog\DetailsTabWidget.py", line 857, in payCommissionChanged
TypeError: 'method' object is not connected