GWT 2.5.0 backwards compatibility

I have an application developed in GXT 2 which uses GWT 2.4

Can I change the version of GWT to 2.5.0 without impacting my application. At least, is it meant to be like that?

Are there changes of API and things that are not backward compatible?

In the case this is not possible: How should I migrate? 

Thanks,

Jordi.

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