Backed out of new_record? to new? transformation as it would screw up existing models that did boolean calls on "new" attributes [DHH]

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Deprecated ActiveRecord::Base.new_record? in favor of ActiveRecord::Base.new? (old version still works until Rails 2.0) [DHH]

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Fixed that AssetTagHelper#image_tag and others using compute_public_path should not modify the incoming source argument (closes #5102) [eule@space.ch]

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Deprecated the auto-appending of .png to AssetTagHelper#image_tag calls that doesn't have an extension [DHH]

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Fixed default routing NoMethodError downcase for nil when default controller provided (closes #5400) [kajism@yahoo.com]

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Added locals hash to partials, which makes for convenient access of some times available/some times not variables (closes #5491) [wbruce@gmail.com]

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Fixed TextHelper#simple_format to deal with multiple single returns within a single paragraph (closes #5835) [moriq@moriq.com]

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Fixed the Ruby/MySQL adapter we ship with Active Record to work with the new authentication handshake that was introduced in MySQL 4.1, along with the other protocol changes made at that time (closes #5723) [jimw@mysql.com]

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Improved resolution of DateHelper#distance_of_time_in_words for better precision (closes #5994) [Bob Silva]

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Deprecation: use :dependent => :delete_all rather than :exclusively_dependent => true. Closes #6024.

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Document validates_presences_of behavior with booleans: you probably want validates_inclusion_of :attr, :in => [true, false]. Closes #2253.

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