ShaderSpider needs to be updated for the new Poser 6 Service Release 3 update, or else using it on unsaved scenes may result in errors.

Without further adieu, the patches:

ShaderSpider 1.5 SR3 Update (PC)

ShaderSpider 1.5 SR3 Update (Mac)

Particles 2.3 and GlowWorm users need not fear, both applications work with SR3.