Description:
Calibre-0.7.59-1 works when python2-qt-4.8.3-1 is installed, but won't start after it's replaced by python2-pyqt-4.8.4-1.

Additional info:
Here's Calibre's output with python2-pyqt-4.8.4:
[code]$ calibre
Traceback (most recent call last):
File "/usr/bin/calibre", line 19, in <module>
sys.exit(main())
File "/usr/lib/calibre/calibre/gui2/main.py", line 372, in main
app, opts, args, actions = init_qt(args)
File "/usr/lib/calibre/calibre/gui2/main.py", line 51, in init_qt
from calibre.gui2.ui import Main
File "/usr/lib/calibre/calibre/gui2/ui.py", line 31, in <module>
from calibre.gui2.widgets import ProgressIndicator
File "/usr/lib/calibre/calibre/gui2/widgets.py", line 23, in <module>
from calibre.gui2.progress_indicator import ProgressIndicator as _ProgressIndicator
File "/usr/lib/calibre/calibre/gui2/progress_indicator/__init__.py", line 15, in <module>
pi_error)
RuntimeError: Failed to load the Progress Indicator plugin: the PyQt4.QtCore module is version 1 but the progress_indicator module requires version -1[/code]

Downgrading from python2-pyqt-4.8.4-1 to python2-qt-4.8.3-1 allows calibre and the other programs it provides to run.