We are aware of the changes to the Marketo Activity API ( http://developers.marketo.com/blog/important-change-activity-records-marketo-apis/ ) and are actively pursuing an upgrade to our SOAP and REST connector to accommodate the change. We plan to have this upgrade complete sometime in late April, which will give plenty of time before the initial upgrades starting on May 17 for Marketo's next release. We are working in conjunction with Marketo to make sure that your integrations continue to run and operate smoothly as Marketo upgrades their software.