Intel Ubuntu 11.10 Sage 4.8

When you enter:


PolynomialRing(QQ,1,'y')
or
R.<y>=PolynomialRing(QQ,1)


returns a multivariable polynomial ring. Whereas

PolynomialRIng(QQ,'y')
or
R.<y>=PolynomialRing(QQ)

returns a univariate polynomial ring. I am using this in Affine Space.  For 
example,

AS.<y>=AffineSpace(1,QQ)
AS.coordinate_ring()

returns a multivariate polynomial ring.

Is this a bug?  Is there a way to get the affine coordinate ring to be 
univariate?

Thanks,
  Ben

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