iPhone Leak on UITextfield text

Instruments tools says this is a leak but I can't figure out why, a开发者_JS百科ny ideas?

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Make sure you are releasing self.variables property in your dealloc (or somewhere). Also, ensure that your Variable class is releasing variableValues property in the Variable class's dealloc.

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That's not a proper way to assign @"" to a NSMutableString. You should use setString: instead.