[SOLVED][Drupal Boost] warning: array_unique() expects parameter 1 to be array, null given in sites/all/modules/boost/boost.module on line 806
A number of Drupal users using the Boost module in their Drupal sites were encountering a warning: array_unique() expects parameter 1 to be array, null given in sites/all/modules/boost/boost.module on line 806. If you are facing the same warning message in your Drupal site when using Boost then read on to know the fix.
A small number of Drupal users reported that they had fixed the issue after unchecking the "Clear all cached pages in a menu on an insert/update/delete operation" found in the Settings page of the Boost module. Although it is not a fix it should do the job for you.
Hope that helps.
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Reference: http://drupal.org/node/1350432
