Unable to add content after 7.12 to 7.13 update (and core 7.36 to 7.37 update).

After updating core from 7.36 to 7.37, and UPDATING i18N FROM 7.12 TO 7.13 I receive errors - UNABLE TO ADD CONTENT ON FOUR SITES (and counting) INCLUDING A NEWLY INSTALLED TEST SITE. When I try to add content, drupal reports no content types, even though there are 5 to 10 content types defined,( two to seven of which are in use on different sites). This is for multilingual sites (a variety - some with entity translation, some without, some with menu translation, some without) that is on an aegir (BOA latest stable 2.4.2) self-maintained platform.

The exact error message is: You have not created any content types yet. Go to the content type creation page to add a new content type.

The content types do exist, the content exists, but trying to add content does not work due to the above error.

Something is very wrong here. What info/ logs can I provide that will help to localize the problem?

I have filed this bug report in the core queue at https://www.drupal.org/node/2485527
as it is similar in nature to the issue that the core update to 7.36 caused some people.

Best,

Ed