spring:url tag works locally in Jetty but not deployed in Tomcat

When I run my app locally in Jetty, I can change the context path to my heart's desire and my URLs are modified accordingly. When I deploy the same app to a standard Tomcat install, the generated URLs are missing the context path.

Is there some simple piece of configuration I could be missing that would do this? Why would Spring be unable to get the context path from Tomcat?

Ugh, that's embarrassing (where's the delete thread button). I was using two templates, one didn't prefix the paths correctly. Nothing to see here.

yes,there is some simple piece of configuration I could be missing that would do this