[Building Sakai] 2.9 install

[Gregory Guthrie]

I setup 2.9 according (I think) to the confluence guide, then rolled Tomcat back from 7.0.37 to T7.0.21 (per notes posted here recently).

Tomcat starts and runs fine, but /portal fails:  

   HTTP Status 404 - /portal
   ________________________________________
   type Status report
   message /portal
   description The requested resource (/portal) is not available.
   ________________________________________
   Apache Tomcat/7.0.21

All I see in the catalina.log is:
   Apr 10, 2013 9:56:14 PM org.apache.tomcat.util.http.Cookies processCookieHeader
   INFO: Cookies: Invalid cookie. Value not a token or quoted value

Help/hints?
-------------------------------------------