[v1.6.1] TypeError - /usr/lib/python3/dist-packages/OpenNumismat/ListView.py:281

OpenNumismat: 1.6.1
OS: Linux 3.16.0-4-686-pae (#1 SMP Debian 3.16.43-2 deb8u5 (2017-09-19))
Python: 3.4.2 (32bit)
Qt: 5.3.2
Locale: pt

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/OpenNumismat/PageView.py", line 496, in modelChanged
self.listView.modelChanged()
File "/usr/lib/python3/dist-packages/OpenNumismat/ListView.py", line 281, in modelChanged
labelText = self.tr("%d/%d coins") % (newCount, totalCount)
TypeError: %d format: a number is required, not NoneType