We've been using the psqlodbc drivers for a few years now, and I noticed that the most recent driver doesn't ship as a MSI anymore, and instead uses its own setup (which is good since there is only one setup now for both platforms). It's however still listed in the "MSI" section, not sure if that is by design?
I'm also curious if 2003/XP are still fully supported. It seems to work, but one of our applications running on 2003 crashed recently, with the crash in the psqlodbc35w module. We don't really test much on 2003 anymore, but some of our customers are still running 2003 so I wanted to make sure that it's at least theoretically supported.