BUG: targets async="true" ignored identity impersonate

If you are running with <identity impersonate="true"...> in your web.config and you set targets async="true", the lazy writer thread doesn't work under the context of your impersonated identity.  If you instead put in a AsyncWrapper, that works fine.  If you use async="true" and put in an ImpersonatingWrapper duplicating the info in your identity impersonate in web.config that works fine (but is of course undesirable).