I'm confused. I've seen several posts over the past couple of days for C3D 2012 SP3, and the webpage has a posting date of June 4, 2013. I downloaded SP3 back in April. I checked the file name and the readme, both indicate it's SP3. My program listing also indicates that I installed SP3 back in April. What gives?
That's not abnormal on the KB articles, Lisa. It most likely got web content updated on the 4th. This does not appear to be a new service pack that you do not have.