diff --git a/doc/bugs/xdg-user-dir_error.mdwn b/doc/bugs/xdg-user-dir_error.mdwn
new file mode 100644
index 0000000000..c68850c296
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+++ b/doc/bugs/xdg-user-dir_error.mdwn
@@ -0,0 +1,5 @@
+Run *git annex webapp* in Debian Sid with KDE.
+
+It opens the web browser with this error: **Internal Server Error** *xdg-user-dir ["DESKTOP"] exited 127*.
+
+I've tried to changing the xdg-user-dir config with no success.