Compilation problem

Hi,

I have a compilation problem with one of my project.
It's the first time I have this kind of problem.

When building my project, IDEA complains about missing class javax.xml.bind.annotation.XmlRootElement.
The strange part is that I use JDK 1.5.0_09, so this class exists in the classpath.
Moreover, I don't use this class at all in my project, not even within my dependencies (handled by Maven2).
When I compile the project in console, using Maven, there's no problem at all.
It even works within other IDE's as well.

Anybody experienced this strange behaviour before ?

Regards.