Working with the original %CATALINA%\conf\web.xml, when I tried to declare a custom tag in my JSP multiple times, all the tag declarations other than the first one assumed the value of the first tag declaration. But when I turn the tag pooling off, it each tag declaration behaves distinctly.
http://jakarta.apache.org/tomcat/faq/misc.html#tagbroken *** This bug has been marked as a duplicate of 16001 ***