1.03.021 Patch?

I know that 1.03 is the latest official version of Sins, but I fired up Stardock Central to discover that there was a 1.03.021 patch out.  My SC's also set to show pre-release versions, but I don't think that made any difference.  It's also not downloading at the moment, but that's beyond the point.  There are changelogs for every Sins patch; is there something different in 1.03.021?  Is SC the go-to place for the latest patches (which is what I use for GalCiv II), or should I depend more on the official Sins website?