diff --git a/ptbposter/ptbposter.cls b/ptbposter/ptbposter.cls
index f92c96d72f957cef71190ce2adb6a74f489cbc3f..58bf96951a981862256d97838ee1d40597694e31 100644
--- a/ptbposter/ptbposter.cls
+++ b/ptbposter/ptbposter.cls
@@ -227,8 +227,8 @@
   \PTB@tempdima=-0.08023549218\PTB@scale@base
   \put(\PTB@leftmargin,\PTB@tempdima){%
     \includegraphics[width=.401\PTB@scale@base]{ptbposter-logo.pdf}}%
-  \PTB@tempdima=-0.134566863195\PTB@scale@base
-  \put(\PTB@leftmargin,\PTB@tempdima){\parbox[b]{\textwidth}{%
+  \PTB@tempdima=-0.125\PTB@scale@base
+  \put(\PTB@leftmargin,\PTB@tempdima){\parbox[c]{\textwidth}{%
     \sffamily\titleFontSize\@title}}%
   \PTB@tempdima=-0.159798150044\PTB@scale@base
   \def\and{, }%
@@ -406,21 +406,21 @@
   \setlength\PTB@texthsep{.75em}%
   \setlength\PTB@textvsep{.75em}%
   \ifx\@author\@empty
-    \setlength\PTB@topmargin{0.16\PTB@scale@base}%
+    \setlength\PTB@topmargin{0.152\PTB@scale@base}%
   \else
     \setlength\PTB@topmargin{0.180824222418\PTB@scale@base}%
   \fi
   \ifPTB@landscape
     \setlength\PTB@framewidth{0.950378471315\PTB@scale@base}%  3215pt (1130mm) bei A0
     \ifx\@author\@empty
-      \setlength\PTB@frameheight{0.483397814651\PTB@scale@base}% 1565pt  (550mm) bei A0
+      \setlength\PTB@frameheight{0.490824222418\PTB@scale@base}% 1565pt  (550mm) bei A0
     \else
-      \setlength\PTB@frameheight{0.462573592233\PTB@scale@base}% 1565pt  (550mm) bei A0
+      \setlength\PTB@frameheight{0.462\PTB@scale@base}% 1565pt  (550mm) bei A0
     \fi
   \else
     \setlength\PTB@framewidth{0.656013458076\PTB@scale@base}%  2219pt  (780mm) bei A0
     \ifx\@author\@empty
-      \setlength\PTB@frameheight{0.760941969991\PTB@scale@base}% 2504pt  (880mm) bei A0
+      \setlength\PTB@frameheight{0.769\PTB@scale@base}% 2504pt  (880mm) bei A0
     \else
       \setlength\PTB@frameheight{0.740117747573\PTB@scale@base}% 2504pt  (880mm) bei A0
     \fi