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*SVN*
+* CHANGED DEFAULT: set ActiveRecord::Base.allow_concurrency to false. Most AR usage is in single-threaded applications. [Jeremy Kemper]
+
* Renamed the "oci" adapter to "oracle", but kept the old name as an alias #4017 [schoenm@earthlink.net]
* Fixed that Base.save should always return false if the save didn't succeed, including if it has halted by before_save's #1861, #2477 [DHH]