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-rw-r--r--docs/manual/upgrading.html.en8
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/manual/upgrading.html.en b/docs/manual/upgrading.html.en
index 4de640cec8..79d721615d 100644
--- a/docs/manual/upgrading.html.en
+++ b/docs/manual/upgrading.html.en
@@ -275,6 +275,14 @@
that the size overhead added by the compression is larger than the data
to be compressed.
</li>
+
+ <li>Multi-language error documents from 2.2.x may not work unless
+ they are adjusted to the new syntax of <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>'s
+ <code>#if expr=</code> element or the directive
+ <code class="directive"><a href="./mod/mod_include.html#ssilegacyexprparser">SSILegacyExprParser</a></code> is
+ enabled for the directory containing the error documents.
+ </li>
+
</ul>
</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>