Qubes Manager: cloning broken in r3.0 current-testing (regression)

[qjoo]

error when trying to clone via qubes manager gui (right click):

    Whoops. A critical error has occured. This is most likely a bug in Qubes Manager.

    TypeError: arguments did not match any overloaded call: QInputDialog.getText(QWidget, QString, QString, QLineEdit.EchoMode mode=QLineEdit.Normal, QString text=QString(), Qt.WindowFlags flags=0) -> (QString, bool): argument 4 has unexpected type 'str' QInputDialog.getText(QWidget, QString, QString, QLineEdit.EchoMode, QString, Qt.WindowFlags, Qt.InputMethodHints) -> (QString, bool): argument 4 has unexpected type 'str'
    at line 1052
    of file /usr/lib64/python2.7/site-packages/qubesmanager/main.py.

    ----
    line: name_format % name_number)
    func: action_clonevm_triggered
    line no.: 1052
    file: /usr/lib64/python2.7/site-packages/qubesmanager/main.py

packages versions:

    qubes-utils-libs-3.0.7-1.fc20.x86_64
    qubes-template-fedora-21-minimal-3.0.1-201504112248.noarch
    qubes-core-dom0-linux-3.0.5-1.fc20.x86_64
    qubes-db-libs-3.0.2-1.fc20.x86_64
    qubes-kde-dom0-4.12.3-1.fc20.noarch
    qubes-template-fedora-21-3.0.1-201504110311.noarch
    qubes-gpg-split-dom0-2.0.11-1.fc20.x86_64
    qubes-pdf-converter-dom0-2.0.3-1.fc20.x86_64
    qubes-template-debian-8-3.0.1-201504111919.noarch
    qubes-libvchan-xen-3.0.5-1.fc20.x86_64
    qubes-core-dom0-3.0.11-1.fc20.x86_64
    qubes-manager-3.0.4-1.x86_64
    qubes-db-3.0.2-1.fc20.x86_64
    qubes-db-dom0-3.0.2-1.fc20.x86_64
    qubes-release-notes-3.0-0.3.noarch
    qubes-utils-3.0.7-1.fc20.x86_64
    qubes-release-3.0-0.3.noarch
    qubes-gui-dom0-3.0.2-1.fc20.x86_64
    qubes-core-dom0-doc-3.0.11-1.noarch
    qubes-artwork-3.0.1-1.fc20.x86_64