Why doesn't Jetty recompile tags?

[53rg10]

I was trying to add a simple link into the web client header by modifying the view.tag, but jetty doesn't recompile the tag class.

Why is that, and how to make it recompile it?

After deleting the view_tag.class from work dir and restarting jetty it just complains that the view.tag is missing.

view.tag - /opt/zimbra/jetty-6.1.22.z6/webapps/zimbra/WEB-INF/tags/infra/view.tag)
view_tag.class (/opt/zimbra/jetty-6.1.22.z6/work/zimbra/jsp/org/apache/jsp/tag/web/infra/view_tag.class)

Zimbra version zcs-6.0.7_GA_2473.F11_64.20100616200802

Tnx for your help!