spautolm

spautolm gives me the following warning (from Matrix):

sres1=spautolm(formula = <omitted>, listw=colw, family = "SAR", method

= "Matrix")
Warning message:
In determinant(x, TRUE) : This version of the Matrix package returns
|determinant(L)| instead of determinant(A), i.e., a
*DIFFERENT* value.
 If still necessary, do change your code, following
http://matrix.r-forge.r-project.org

Is this something I should worry about?

Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de