New LibreOffice-pyuno 4 built without python3 support. In previous 3 version were next files /usr/lib64/python2.7/site-packages/uno.py /usr/lib64/python2.7/site-packages/unohelper.py in libreoffice-pyuno package. New office use python3, but next files are absent. --- /usr/lib64/python3.3/site-packages/__pycache__/uno.cpython-33.pyc /usr/lib64/python3.3/site-packages/__pycache__/uno.cpython-33.pyo /usr/lib64/python3.3/site-packages/__pycache__/unohelper.cpython-33.pyc /usr/lib64/python3.3/site-packages/__pycache__/unohelper.cpython-33.pyo /usr/lib64/python3.3/site-packages/uno.py /usr/lib64/python3.3/site-packages/unohelper.py --- Without it unoconv does not work.
Should be fixed with bug #2967.