I use the setToolTipText to add help popup texts to some of the
JButtons in my application. They show up when running it locally from
NetBeans, but not when accessing it through the Java Web start page. Why
is that? I attach the jnlp file if that should be the source of the
problem.

<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for SwingSet2 Demo Application -->
<jnlp
 spec="1.0+"
 codebase="http://cafka.econ.au.dk/LMDG_Doc/"

 <information>
   <title>Cafkadoc Java Application</title>
   <vendor>CLS</vendor>
  <homepage
href="/home/hlane/java/workspace/Cafka/Cafkadoc/dist/index.html"/>
   <description>Cafka documentation application</description>
   <description kind="short">Application for documentation about the
DLS
projects</description>
   <offline-allowed/>
 </information>
 <security>
     <all-permissions/>
 </security>
<application-desc>
</application-desc>
<resources>
   <j2se version="1.5+"/>
   <jar href="Cafkadoc.jar"/>
 </resources>
</jnlp>

Thanks in advance.