QGIS » QGIS Application

mmqgis fails to load the transfer > Attributes join from CSV file dialogue on master build (error message below).
This is quite a critical error, but imagine it's something wrong with my install.
Any ideas?
(built via deb http://qgis.org/ubuntugis-nightly precise main repository)

An error has occured while executing Python code:

Traceback (most recent call last):
File "/home/robin/.qgis2/python/plugins/mmqgis/mmqgis_menu.py", line 182, in attribute_join
dialog = mmqgis_attribute_join_dialog(self.iface)
File "/home/robin/.qgis2/python/plugins/mmqgis/mmqgis_dialogs.py", line 158, in init
self.set_join_attributes()
File "/home/robin/.qgis2/python/plugins/mmqgis/mmqgis_dialogs.py", line 205, in set_join_attributes
for index, field in searchlayer.dataProvider().fields().iteritems():
AttributeError: 'QgsFields' object has no attribute 'iteritems'

Python version:
2.7.3 (default, Aug 1 2012, 05:25:23)
[GCC 4.6.3]

QGIS version:
1.9.0-Master Master, exported

Python path: ['/usr/share/qgis/python', '/home/robin/.qgis2/python', '/home/robin/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PIL', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/ubuntuone-client', '/usr/lib/python2.7/dist-packages/ubuntuone-control-panel', '/usr/lib/python2.7/dist-packages/ubuntuone-couch', '/usr/lib/python2.7/dist-packages/ubuntuone-installer', '/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol', '/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode', '/home/robin/.qgis2/python/plugins/mmqgis/forms', '/usr/share/qgis/python/plugins/fTools/tools', '/home/robin/.qgis2/python/plugins/mmqgis/forms']