...

ptbposter/ptbposter-tcb.sty

@@ -18,7 +18,7 @@
 \renewcommand*\backgroundContent{%
   \begin{tikzpicture}%
     \shade[top color=backgroundTop, bottom color=backgroundBottom,%
-      shading angle=\ifPTB@landscape 64.07\else 41.55\fi](0,0)%
+      shading angle=\ifPTBlandscape 64.07\else 41.55\fi](0,0)%
       % Winkel auf Basis von \PTB@framewidth und \PTB@frameheight
       rectangle(\PTB@framewidth,\PTB@frameheight);%
   \end{tikzpicture}%