R help - Dec 2011 - confusion about factor scores from princomp function

If I calculate factor scores with princomp() I don't get the same factor
scores using eigen() method.

fctscr1 <- princomp(USArrests, cor=T)$scores
fctscr2 <- scale(as.matrix(USArrests)) %*% eigen(cor(USArrests))$vectors

identical(fctscr1,fctscr2)       # results in FALSE

The values are close but not quite.  Is there something I'm doing wrong?
It's my understanding that princomp() uses eigen() to calculate the factor
loadings.

Larry

	[[alternative HTML version deleted]]