nedforce/devcms-core — comment on commit 5fdaf9b3a99d90345f2a86e2a16157046dc39f64
File: lib/simply_versioned.rb line 118
By gstokkink:

It's necessary for the versioning functionality to work correctly. The expires_on functionality breaks because it wasn't implemented correctly, just like the node association functionalty in acts_as_content_node. These two issues have been resolved in the performance branch.