I have the exact same problem, i'm on an intel based mac, just upgraded from tiger to leopard, and reinstalled the emagic driver, to have this security alert appear every time i log in, and the same alert for the .DS_Store of the "/Library/StartupItems/".

I can't find a work around at the moment, so if anybody has a solution it would be appreciated a lot. If i figure it out in the meantime, i'll post it.