Nidud, thanks a million :)
I've been investigating another strange issue, proc parameters. The symbol offsets in RBP/RSP based frames is spot on and the debugger picks them up perfectly .. except when you have a leaf proc with no locals/invokes and thus no SUB RSP,x
Even though the RSP+ofs values are correct and present on the sym->offset VS seems to have them all shifted out by 8. It appears as if the VS debugger expects RSP to always be aligned 16, which in the case of the leaf proc I don't bother.
I'm debating whether the sub rsp,8 should always be mandatory to keep align-16 even when nothing in the proc would require it.