I was testing the nightly snapshot of seam 2.3, and I found that my spring context didn't start any more after upgrading seam.
This is referencing as part of the spring configuration a seam bean in the spring context.
xsi:schemaLocation="http://jboss.com/products/seam/spring-seam http://jboss.com/products/seam/spring-seam-2.3.xsd ..."
The file spring.schemas that has is included in the jboss-seam-ioc module still includes information about the old 2.2 xsd. Please see attached patch for a fix.