Note, this affects the 'bitmap-gsoc' branch, which is at commit b2675f8b1268c0ea8f116f2512424235929731e4 when I write this.

Picard throws an exception when I start it on my desktop:

18:36 warp@bullet-bill:~/tag$ ~/code/picard/tagger.py .
Traceback (most recent call last):
File "/home/warp/code/picard/tagger.py", line 10, in <module>
main(localedir, True)
File "/home/warp/code/picard/picard/tagger.py", line 643, in main
tagger = Tagger(args, localedir, autoupdate, **kwargs)
File "/home/warp/code/picard/picard/tagger.py", line 197, in _init_
self.window = MainWindow()
File "/home/warp/code/picard/picard/ui/mainwindow.py", line 70, in _init_
self.setupUi()
File "/home/warp/code/picard/picard/ui/mainwindow.py", line 91, in setupUi
self.panel = MainPanel(self, centralWidget)
File "/home/warp/code/picard/picard/ui/mainwindow.py", line 762, in _init_
self.fileview = FileTreeView(window, self)
File "/home/warp/code/picard/picard/ui/itemviews.py", line 216, in _init_
self.setModel(self.model)
File "/home/warp/code/picard/picard/ui/itemviews.py", line 104, in setModel
model.row_hidden.connect(self.setRowHidden)
TypeError: 'setRowHidden()' has no overload that is compatible with 'row_hidden(int,QModelIndex