Do you have an email listserv for receiving updates to your data products?
When you regester for IPUMS-CPS you are automatically added to an email list that sends out updates with details about major releases. Sometimes spam filters catch these emails so you may need to make sure your email box recognizes ipums@umn.edu. Also, every major update to IPUMS-CPS data is accompanied by a revisions note that is added to the Errata and Revisions page.
I hope this helps