diff --git a/i2p2www/pages/downloads/list.html b/i2p2www/pages/downloads/list.html
index 8efefc9ba2b80fbc612737f8c7039132c163f765..cc1e9322589898cbe9c77322464a2c8628b33669 100644
--- a/i2p2www/pages/downloads/list.html
+++ b/i2p2www/pages/downloads/list.html
@@ -64,6 +64,15 @@ If you would like to try the latest experimental I2P projects, visit the <a href
 
     <h5>{%- trans %}I2P for Linux{%- endtrans %}</h5>
     {% call package('unix') %}
+
+    <p><b>NOTE:</b>
+    Due to an <a href="https://izpack.atlassian.net/jira/software/c/projects/IZPACK/issues/IZPACK-1786?jql=project%20%3D%20%22IZPACK%22%20ORDER%20BY%20created%20DESC">unfixed IzPack bug</a>
+    the installer will fail with "Index 70131 out of bounds" with Java 21 or higher on Ubuntu. May also affect other platforms.
+    Workarounds:
+    Use our <a href="{{ get_url('downloads_debian') }}">packages for Debian &amp; Ubuntu</a>
+    or run the installer with Java 17 or lower. You may switch back to Java 21 or higher after the install is complete.
+    </p>
+
     <p>{% trans i2pversion=ver() -%} The most reliable way to launch the installer is from a terminal like this:
         <code>java -jar i2pinstall_{{ i2pversion }}.jar</code>. This will launch the GUI installer. Depending on how your computer is set up, you may be able to start the installer by double-clicking the &quot;i2pinstall_{{ i2pversion }}.jar&quot; file
         or right-clicking the file and selecting &quot;Open with Java&quot;. Unfortunately, this behaviour is difficult to predict. {%- endtrans %}</p>