Sweeping private key broken?

[nomnombtc]

Hello,

I just tried to sweep a privatekey (from bitcoin-qt 0.10.0, starts with L)
into a new created electrum (2.0.1) wallet, but it fails with this:

tx.sign(), keypairs: {'02717541e595e42e630d877b32b80bb190f5fa075aea35cb5301bd1f4615225952': 'LoLprivatekeygoeshere'}
is_complete False
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/electrum_gui/qt/main_window.py", line 2593, in sweep_key_dialog
    self.show_transaction(tx)
  File "/usr/lib64/python2.7/site-packages/electrum_gui/qt/main_window.py", line 601, in show_transaction
    d = transaction_dialog.TxDialog(tx, self)
  File "/usr/lib64/python2.7/site-packages/electrum_gui/qt/transaction_dialog.py", line 108, in __init__
    self.update()
  File "/usr/lib64/python2.7/site-packages/electrum_gui/qt/transaction_dialog.py", line 138, in update
    if self.wallet.can_sign(self.tx):
  File "/usr/lib64/python2.7/site-packages/electrum/wallet.py", line 1016, in can_sign
    if self.can_sign_xpubkey(x):
  File "/usr/lib64/python2.7/site-packages/electrum/wallet.py", line 1050, in can_sign_xpubkey
    if x_pubkey[0:2] in ['02','03','04']:
TypeError: 'NoneType' object has no attribute '__getitem__'