I am using a variant of asterisk based in 1.0.7. I haven't had any
problem calling between polycom and it. Was there any bug fix 4 weeks
ago?
Regarding the reINVITE - I've seen a number of UAs that dont return all rr parms in the subsequent Route. If your configuration depends on this feature you will have problems with these UAs. FYI - Asterisk prior to about 4 weeks ago has this problem. Also some WiFi SIP phones.