I was tuning up my work application that makes heavy use of Lucene, and noticed it suddenly didn't compile anymore. Specifically, the 2.9 bump did NOT change the SLOT value, and 2.9 removed some classes (specifically RemoteSearchable, RemoteCachingWrapperFilter). Please move 2.9* to a 2.9 slot, to fix the breakage you introduced.
Fixed. You will notice the 2.4 slot will downgrade. Sorry for the inconvenience :)