[v1.6.5] TypeError - d:\OpenNumismat\open-numismat\OpenNumismat\PageView.py:134

OpenNumismat: 1.6.5
OS: Windows 10 (10.0.15063)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: de

Traceback (most recent call last):
File "d:\OpenNumismat\open-numismat\OpenNumismat\PageView.py", line 134, in __lt__
TypeError: unorderable types: str() < int()