getting 'TypeError: argument of type 'NoneType' is not iterable' after upgrading Python bindings to 2.49.1

[valermor]

File ".../tests/acceptance/venv/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 712, in find_element
    {'using': by, 'value': value})['value']
  File ".../tests/acceptance/venv/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 201, in execute
    self.error_handler.check_response(response)
  File ".../tests/acceptance/venv/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 164, in check_response
    if 'screen' in value:
TypeError: argument of type 'NoneType' is not iterable

On the log I see this is happening when receiving a NoSuchElementException, which is the result of a find_element on a non-existing element on the page.
Notice I am using Chromedriver v.47.0.2526.73 on Win XP

How to reproduce it

I guess this is the way to reproduce it, i.e. by trying to locate an element which is not going to be found on the page. I will confirm later on during the day with snippet.

Further info:

Using capabilities:
mobileEmulationEnabled: False
rotatable: False
browserConnectionEnabled: False
acceptSslCerts: True
cssSelectorsEnabled: True
chrome: {u'userDataDir': u'C:\DOCUME1\ADMINI1\LOCALS~1\Temp\scoped_dir944_19782'}
javascriptEnabled: True
databaseEnabled: False
hasTouchScreen: False
takesScreenshot: True
webdriver.remote.sessionid: 7d09f2445d2f467abe956bde72f64aec
browserName: chrome
version: 47.0.2526.73
hasMetadata: True
platform: Windows NT
nativeEvents: True
applicationCacheEnabled: False
webStorageEnabled: True
locationContextEnabled: True
handlesAlerts: True
takesHeapSnapshot: True

[AutomatedTester]

Will do another point release now, sorry for that.