I'm observing this in the latest EAP and production builds. We are using spring integration. The attached screenshot shows the inspection problem. The integration:poller tag is supported as a child of inbound-channel-adapter. The poller child element is defined as a reference in the XSD and the integration XSD is imported. Not sure if that's causing the problem.
Is this bug reported? If not, I'll add an issue for it to the issue tracker.