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diff --git a/doc/bugs/git-annex_doesn__39__t_list_files_containing_ISO8859-15_characters.mdwn b/doc/bugs/git-annex_doesn__39__t_list_files_containing_ISO8859-15_characters.mdwn
index 4ec042840..382ca9a0c 100644
--- a/doc/bugs/git-annex_doesn__39__t_list_files_containing_ISO8859-15_characters.mdwn
+++ b/doc/bugs/git-annex_doesn__39__t_list_files_containing_ISO8859-15_characters.mdwn
@@ -33,3 +33,16 @@ git-annex 4.20130227, on Debian GNU/Linux (sid, i386).
LC_ALL=
</code></pre>
+> Tracked this back to a bug in either the C library or the haskell
+> regex-posix wrpaper around it. I'm not sure which, but I emailed the
+> maintainer of the haskell library. It just doesn't think these
+> things are characters; even `.` fails to match them! Everything should
+> match that...
+>
+> There are apparently quite a lot of bugs on POSIX regex libraries
+> as implemented on different systems:
+> <http://www.haskell.org/haskellwiki/Regex_Posix>
+>
+> It seemed best to jettison this dependency entirely; I've switched it to
+> haskell's pure regex-tdfa library, which works nicely. [[done]]
+> --[[Joey]]