How to stop menu links being disabled after saving nodes?
Here's a quick fix:


Download version 1.7 of i18n.
Unzip it and find the folder named i18n_menu
Go to your site's modules directory (could be /sites/all/modules/)
    Find the folder i18n
Replace the subfolder i18n/i18n_menu with the version from version
1.7 you downloaded in step 1


You can also check this bug report: http://drupal.org/node/1905268