"grffile" u.a.

ptbposter/ptbposter-add.sty

-\ProvidesPackage{ptbposter-add}[2016/01/25 v0.1a supplements for ptbposter (RN)]
+\ProvidesPackage{ptbposter-add}[2019/02/20 v0.1b supplements for ptbposter (RN)]
 
 \RequirePackage{ragged2e}
 
@@ -29,7 +29,7 @@
           \hspace{0pt}\ifPTB@temp\RaggedRight\fi#3
         \end{minipage}
       \fi
-      \par\ifx\relax#4\relax\else\vskip\columnsep #4\fi
+      \par\ifx\relax#4\relax\else\vskip.75\columnsep #4\fi
     \@end@tempboxa
   \end{minipage}%
   \endtrivlist

ptbposter/ptbposter.cls

@@ -4,7 +4,7 @@
 
 \NeedsTeXFormat{LaTeX2e}[1999/12/01]
 \ProvidesClass{ptbposter}
-    [2017/10/27 v0.6c PTB-Poster-Klasse (RN)]
+    [2019/02/20 v0.6d PTB-Poster-Klasse (RN)]
     
 \newif\ifPTB@useCMYK \PTB@useCMYKfalse % vorerst
 
@@ -241,7 +241,7 @@
 \fi
 
 \RequirePackage[texcoord]{eso-pic}
-\RequirePackage{pict2e,picture,ifdraft,booktabs}
+\RequirePackage{grffile,pict2e,picture,ifdraft,booktabs}
 \RequirePackage{varwidth,qrcode}
 
 \AddToShipoutPictureFG*{% Kopf (relativ zur oberen Blattkante)