HELP! Copy/Paste trouble, vector art has rough edges!

Okay, I'm a very experienced Photoshop user, but I've never seen this problem. When I copy a nice piece of vector artwork from Illustrator CSII and paste it into my Photoshop file as pixels, it's got rigid edges; even after I double click to lock it in.

This just started, anyone know why? I checked my prefs in PS and Illustrator, but didn't see anything out of the ordinary.

The PS file IS 300dpi, 8-bit, RGB right now.

Ideas?????

Check your clipboard preferences in Illustrator.

Also, make sure you don't have a version of Entourage older than 11.2.5 running at the same time. (Yes, MS Entourage.)