Has anyone tried running sm v4.3 pro with PT 10?
Yes, I'm working with PT10 (on OsX 10.6.8) and SMpro 4.3: it works, but SM doesn't auto-detect the PT session you're working on, so you just have to manually set it. Furthermore, the new PT functions (like interleaved audiofiles) aren't supported in SM: it just means that you cannot send an interleaved file to PT (an annoying popup appears).
However, all the other functions in SM behave like they always did. And I'm really really happy with the new Pro Tools release!
Doing it, seems to be working just fine, including session detection here. Using 4.3 v3 FWIW