Illustrator creates vector objects by default and that looks like a vector object descriptor. Because ArtRage has never allowed the pasting of vector objects and we haven't changed anything in our paste process my best guess is that either a change in the OS means that the clipboard is favouring pasting the text definition over any bitmap version stored in there, or that Illustrator is not providing a bitmap version of the object to the clipboard.

If you take a look at Illustrator you can probably find some way to copy bitmap versions of your vector objects to the clipboard (I don't use Illustrator enough to know offhand what that might be, but a quick check online seems to suggest it's possible). That should allow ArtRage to locate the bitmap version when pasting and apply that.

Hope that helps!