All my components configured in components.xml get a seam validator error
class <classname> of component <componentName> does not contain setter for property "startup"
Off course these components don't contain a startup property and the configuration in components.xml doesn't mention startup either.
Trigger the bug.
This problem started with JBoss Tools 2.1.0.GA and is stil present in 2.1.1, downgrading to 2.0.1.GA correct the problem. So it looks like a regression bug