Description of problem:
I just tried to convert a rar file to epub

Version-Release number of selected component:
calibre-0.9.1-1.fc17

Additional info:
libreport version: 2.0.18
abrt_version:   2.0.18
cmdline:        python2 /usr/bin/calibre-parallel
kernel:         3.6.6-1.fc17.x86_64

backtrace:
:__init__.py:360:__init__:OSError: libunrar.so: cannot open shared object file: No such file or directory
:
:Traceback (most recent call last):
:  File "/usr/bin/calibre-parallel", line 20, in <module>
:    sys.exit(main())
:  File "/usr/lib64/calibre/calibre/utils/ipc/worker.py", line 185, in main
:    result = func(*args, **kwargs)
:  File "/usr/lib64/calibre/calibre/gui2/convert/gui_conversion.py", line 31, in gui_convert_override
:    override_input_metadata=True)
:  File "/usr/lib64/calibre/calibre/gui2/convert/gui_conversion.py", line 22, in gui_convert
:    override_input_metadata=override_input_metadata)
:  File "/usr/lib64/calibre/calibre/ebooks/conversion/plumber.py", line 663, in __init__
:    self.input, input_fmt = self.unarchive(self.input, tdir)
:  File "/usr/lib64/calibre/calibre/ebooks/conversion/plumber.py", line 730, in unarchive
:    extract(path, tdir)
:  File "/usr/lib64/calibre/calibre/__init__.py", line 267, in extract
:    from calibre.libunrar import extract as rarextract
:  File "/usr/lib64/calibre/calibre/libunrar.py", line 34, in <module>
:    _libunrar = load_library(_librar_name, cdll)
:  File "/usr/lib64/calibre/calibre/__init__.py", line 252, in load_library
:    return cdll.LoadLibrary(name+'.so')
:  File "/usr/lib64/python2.7/ctypes/__init__.py", line 438, in LoadLibrary
:    return self._dlltype(name)
:  File "/usr/lib64/python2.7/ctypes/__init__.py", line 360, in __init__
:    self._handle = _dlopen(self._name, mode)
:OSError: libunrar.so: cannot open shared object file: No such file or directory
:
:Local variables in innermost frame:
:_FuncPtr: <class 'ctypes._FuncPtr'>
:handle: None
:name: 'libunrar.so'
:use_last_error: False