Thanks Liu, But somewhat I disagree because i consider the upgrading from 3.x to 4.x is a major change in architectureBut upgrading from 4.0 to 4.0.0.1 could be very simple. infact i should not call as upgradation instead of applying a minor patch on 4.0
:) Actually 4.0.0.1 is a major upgrade even though it only contains fixes. The minor patch you're talking about is called testfix in IBM terms which only fixes a certain defect.
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