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-rw-r--r--content/posts/2023-06-02-end-of-may-miscellany.md5
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diff --git a/content/posts/2023-06-02-end-of-may-miscellany.md b/content/posts/2023-06-02-end-of-may-miscellany.md
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--- a/content/posts/2023-06-02-end-of-may-miscellany.md
+++ b/content/posts/2023-06-02-end-of-may-miscellany.md
@@ -14,6 +14,11 @@ W][pi0w], which failed with "Illegal instruction" errors during
`dist-upgrade` and left the system unbootable in two separate upgrade
attempts.
+I don't know if this is a pre-release issue with [Bookworm][] or if this
+particular [Pi Zero W][pi0w] is starting to fail. In either case, be
+sure to back up your SD card before trying to upgrade a [Pi Zero
+Ws][pi0w] to [Bookworm][].
+
### PNG Compressors
I tried the following [PNG][] compressors on a set of several