This should not come as a huge surprise but After Effects CS4 will not be universal binary. Meaning that CS3 will be the last version for the circa 2005 G5. I am thinking by now most users in a production environment have upgraded. Source keyframes blog at adobe.

Spent the last hour upgrading to BlogCFC 5.9.1.001 from 5.9. This is my first upgrade since switching over to BlogCFC back in October 2007. The upgrade went pretty smooth, I did have to make some SQL changes but as always the documentation was well done. The really benefit I wanted was the one click kill comment in email that was introduced in 5.9.1. If you do not know about this it allows you to click the spam comments with a link in the admin email saving you from needing to login.