On my machine, the complete string is dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0WW7PG:rvrA00:cvnDellInc.:ct8:cvr0.1 - so the *XPSL322X* seems to still match. I'm not sure on the syntax either really, but it seemed to work for me at least - did it work for you?
On my machine, the complete string is dmi:bvnDellInc. :bvrA08: bd04/18/ 2013:svnDellInc .:pnDellSystemX PSL322X: pvr:rvnDellInc. :rn0WW7PG: rvrA00: cvnDellInc. :ct8:cvr0. 1 - so the *XPSL322X* seems to still match. I'm not sure on the syntax either really, but it seemed to work for me at least - did it work for you?