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I20031008 1. select an expression and introduce a param for it 2. select the param and introduce a param for it ==> you end up with an unused param (the first one) ==> the refactoring should check whether the new code results in unused parameters and either remove them or ask the user (2nd page) whether to remove them.
Probably not for 3.0. The workaround is to use Change Method Signature to rename a parameter.