diff --git a/changes/bug22424 b/changes/bug22424
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+  o Minor bugfixes (storage directories):
+    - Always check for underflows in the cached storage directory usage amount.
+      If the usage does underflow, re-calculate the usage. Also, avoid a
+      separate underflow when the usage is not known.
+      Fixes bug 22424 in 0.3.1.1-alpha.