Have a look at what is coming up and contribute your suggestions - Build Pipeline Plugin - Roadmap
Please raise issues @ http://code.google.com/p/build-pipeline-plugin/issues/list
This is because the configuration files refer to old fields that may no longer exist.
In order to correct these issues go to the Job configuration page, confirm that all of the details are correct and click on the Save button.
Feedback and Source Code
The code source is hosted at Google Code so that we can support both Jenkins and Hudson.
Please use Google Code rather than this page to report bugs and make request features.
More on Pipelines
The canonical reference for pipelines is the book Continuous Delivery.