EAP 3212: file com/intellij/openapi/extensions/AreaInstance.class not found

Just tried rebuilding my plugin code under the new EAP and noticed the following error:

compile:
Compiling 60 source files to /home/amrk/cruisecontrol/jirabrowser/main/build/classes
/home/amrk/cruisecontrol/jirabrowser/main/src/com/talios/jira/browser/IssueBrowserPanel.java:83: cannot access com.intellij.openapi.extensions.AreaInstance
file com/intellij/openapi/extensions/AreaInstance.class not found
JiraConfigurationComponent config = (JiraConfigurationComponent) IssueBrowserPanel.this.project.getComponent(JiraConfigurationComponent.class);

The code in question:

JiraConfigurationComponent config = (JiraConfigurationComponent) IssueBrowserPanel.this.project.getComponent(JiraConfigurationComponent.class);

I seem to get it in 2-3 places in the codebase, all on lines calling getComponent().

Have I missed some API change somewhere?