MS breaks Pathauto and the "Patterns" tabs

Hi,

When Mobile Switch is enabled, Pathauto fails to create new aliases on node creation:

• The checkbox "Generate automatic URL alias" is always unchecked after saving a node.
• The access to the "Patterns" tab is broken in the Pathauto settings (admin/config/search/path/patterns)

Some details:

• Tested several times by enabling/disabling Mobile Switch and Patterns tab works when MS is disabled (flush the cache after enable/disable the module)
• Nothing in the PHP or Apache logs.
• This issue was also reported in this comment : http://drupal.org/node/1267966#comment-6578952
• Manual alias creation is working under admin/config/search/path/add

Edit:
After some tests.

• The Patterns tab issue seems to be browser dependent. Under Chrome it works and under Firefox it breaks.
  And disable the MS module fix the issue with this tab under Firefox. So the problem come from MS but maybe this is not the same bug as alias creation. Maybe another ticket have to be created for this tab issue.
• Aliases creation doesn't works at all under Firefox and Chrome when MS is enabled, it works as usual when MS is disabled. Of course we doesn't need to clear cache between disabling/enabling the module.

Best regards,