Since you seam in the stitch one in from the edge, you don's screw up the seaming. I don't slip the first stitch unless it's a scarf or something that isn't seamed, but there's no real reason not to.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry