diff --git a/templates/en/about.html.ep b/templates/en/about.html.ep
index 9842776..379610d 100644
--- a/templates/en/about.html.ep
+++ b/templates/en/about.html.ep
@@ -9,6 +9,28 @@
     The models used here are based on an extension of word2vec (Mikolov et al. 2013), wang2vec (Ling et al. 2015) 
     and on the other hand on simple co-occurence counts and analysis methods that operate on these.
 </p>
+<h3>Effective window size and auto focus</h3>
+<p>
+    The association measures LL, MI, MI², MI³ and nPMI are not computed over the whole context
+    window, but only over the <em>attested positions</em>, i.e. those positions in which the
+    collocate occurs at least once. The expected frequency is based on this effective window,
+    which rates a collocate occurring in few positions higher than one spread over many, and thus
+    helps to tell actual collocations from words that merely occur in the same contexts. Note
+    that the values are therefore not directly comparable to those of tools that always compute
+    with a fixed window size.
+</p>
+<p>
+    LDaf, in contrast, is the <em>auto focus</em> score (Belica), i.e. the highest value that any
+    – not necessarily contiguous – selection of positions reaches, an idea also known from the
+    collocation database <a href="http://corpora.ids-mannheim.de/">CCDB</a>. As its denominator
+    grows with the width of the selection, it rewards pairs whose co-occurrences are
+    concentrated, which is why it usually orders collocates most usefully and is used as the
+    default order here. It is Dice-like, but not Log-Dice, so it is not on the same scale as LD
+    and can be higher or lower than it. Both can be read off the auto-focus column of the
+    collocation table, where the attested positions are marked with ◽ and those selected by the
+    auto focus with ◾. LD itself does not depend on any window.
+</p>
+
 <h3>Disclaimer</h3>
 <p>
     Please note that  – unlike e.g. <a href="https://korap.ids-mannheim.de/">KorAP</a> – we cannot operate DeReKoVecs 
@@ -18,6 +40,16 @@
 </p>
 <h3>Scheduled Downtimes and Announcements</h3>
 <dl id="downtimes">
-    <dt></dt><dd>–</dd>
+    <dt>2026-09-04</dt>
+    <dd>
+        Log-Dice (LD) is now computed exactly as defined by Rychlý (2008),
+        \(14 + \log_2 \frac{2f_{1,2}}{f_1 + f_2}\), without the window size factor that used to be
+        applied to \(f_1\). Values are therefore higher than before, by up to \(\log_2\) of the
+        window size, and directly comparable to those of other tools such as Sketch Engine.
+        LDaf is unchanged, as is the order of the collocates: it is the auto focus score, which
+        keeps the window size factor deliberately, since that is what makes it sensitive to how
+        concentrated a pair is. The other measures are unaffected as well, the window size
+        belonging in their expected frequency.
+    </dd>
 </dl>
 </html>