This was included in the 2009-11-23 change by Ken Brown.
> 2) Changing the verb to w32-shell-execute (ShellExecute) from "open"
> to nil is for some reason I do not know necessary. The answer to why
> hides deep within the w32 registry and maybe some knowledgeable
> persons at MS... It might be a mismatch of some kind, I don't know.
Is this still necessary?