To see the API changes in Eclipse 3.5 compared to another Eclipse release you can import the relevant plug-ins Importing Eclipse binary plug-ins then right click on the project and select “Compare with” -> API Baseline
Under “Add new baseline” you can maintain a pointer to your other Eclipse installation, e..g Eclipse 3.4.
Eclipse will then show you all API changes between the two versions.
(tip is based on a answer from Daniel Megert in the Eclipse RCP newsgroup).
