Another Ch19 Issue
I've just spent the last couple of hours fighting with CH19 - thankfully with sucess, but decided to post in case anyone else hit the same problem.
Installed Tomcat (5.5.9) and had no major issues (other than CH19 only working through netBeans - cheers diegoborgh).
Installed Struts (1.2.7) which worked, as did adding an error message for the comments field.
Trying to add the mask validation resulted in an
java.lang.NoClassDefFoundError: org/apache/oro/text/perl/Perl5Util error.
In order to get it working I worked out you need to download the ORO Jakarta project and copy the jakarta-oro-2.0.8.jar file in to the struts-base/WEB-INF/lib directory.