Postinst fails if webapps/ROOT is a symlink

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Binary package hint: tomcat6

Ubuntu Lucid, amd64, tomcat6 6.0.24-2ubuntu1.4

For historic reasons, we have /var/lib/tomcat6/webapps/ROOT as a symlink into the deployed application. During postinst, dpkg fails:

Setting up tomcat6 (6.0.24-2ubuntu1.4) ...
cp: cannot overwrite non-directory `/var/lib/tomcat6/webapps/ROOT' with directory `/usr/share/tomcat6/webapps/default_root'
dpkg: error processing tomcat6 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 tomcat6

Unless there is a policy reason, I would expect the postinst to ignore changes in /var/lib/tomcat6/webapps, especially since it is not listed as part of the package upstream/static files (dpkg -L tomcat6 | grep ROOT - no results)

[Disconnect (dismc)]

Still broken in 1.6.

[Disconnect (dismc)]

"if [ ! -d /var/lib/tomcat6/webapps/ROOT -a ! -L /var/lib/tomcat6/webapps/ROOT ]; then"

works fine
?field.comment="if [ ! -d /var/lib/tomcat6/webapps/ROOT -a ! -L /var/lib/tomcat6/webapps/ROOT ]; then"

works fine