From 6b57b0e85807ccf2ee3acba6e12f5a9ef02e7517 Mon Sep 17 00:00:00 2001
From: "Achim D. Brucker" <adbrucker@0x5f.org>
Date: Sun, 4 Mar 2018 21:56:14 +0000
Subject: [PATCH] Bug fix: ensure \normallineskiplimit=0pt for qrcode
 generation. This fixed the qrcode generation for classes using a different
 value (e.g., amsart).

---
 authorarchive.sty | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/authorarchive.sty b/authorarchive.sty
index 4b4d734..0f829a8 100644
--- a/authorarchive.sty
+++ b/authorarchive.sty
@@ -197,15 +197,18 @@
 \AddToShipoutPicture*{%
   \setlength{\unitlength}{1mm}%
   \authorat{%
-    \ifAA@nourl%
-       \ifx\AA@doi\@empty%
-         \hspace{0.585cm}
-       \else%
-          \raisebox{.5cm}[.5cm]{\qrcode[hyperlink,height=1.17cm,padding]{https://doi.org/\AA@doi}}%
-        \fi%
-    \else%
-      \raisebox{.5cm}[.5cm]{\qrcode[hyperlink,height=1.17cm,padding]{\AA@baseurl/\AA@key\AA@suffix}}%
-    \fi%
+    \bgroup%
+      \normallineskiplimit=0pt%
+      \ifAA@nourl%
+         \ifx\AA@doi\@empty%
+           \hspace{0.585cm}
+         \else%
+            \raisebox{.5cm}[.5cm]{\qrcode[hyperlink,height=1.17cm,padding]{https://doi.org/\AA@doi}}%
+          \fi%
+      \else%
+        \raisebox{.5cm}[.5cm]{\qrcode[hyperlink,height=1.17cm,padding]{\AA@baseurl/\AA@key\AA@suffix}}%
+      \fi%
+    \egroup%
     \authorcrfont\parbox[b]{\AA@width-1.4cm}{
       \ifAA@LNCS%
         \AA@publication, pp. \thepage--\pageref{LastPage}, \AA@year.