diff -r 46a9fde631f4 -r 75db7bb8dce8 QTfrontend/ui/widget/about.cpp
--- a/QTfrontend/ui/widget/about.cpp	Wed Jan 02 11:11:49 2013 +0100
+++ b/QTfrontend/ui/widget/about.cpp	Sun Jan 27 00:28:57 2013 +0100
@@ -23,10 +23,21 @@
 #include <QRegExp>
 #include <QNetworkAccessManager>
 #include <QNetworkRequest>
+#include <QMessageBox>
 #include <QNetworkReply>
 #include <QDebug>
 #include "hwconsts.h"
 #include "SDLInteraction.h"
+#include "SDL.h"
+#include "SDL_version.h"
+#include "physfs.h"
+
+#ifdef VIDEOREC
+extern "C"
+{
+#include "libavutil/avutil.h"
+}
+#endif
 
 #include "about.h"
 
@@ -35,6 +46,9 @@
 {
     QGridLayout *mainLayout = new QGridLayout(this);
 
+    QVBoxLayout * leftLayout = new QVBoxLayout();
+    mainLayout->addLayout(leftLayout, 0, 0, 2, 1);
+
     QLabel *imageLabel = new QLabel;
     QImage image(":/res/Hedgehog.png");
     imageLabel->setPixmap(QPixmap::fromImage(image));
@@ -44,7 +58,7 @@
     imageLabel->setMinimumHeight(30);
     imageLabel->setMaximumHeight(300);
 
-    mainLayout->addWidget(imageLabel, 0, 0, 2, 1);
+    leftLayout->addWidget(imageLabel, 0, Qt::AlignHCenter);
 
     QLabel *lbl1 = new QLabel(this);
     lbl1->setOpenExternalLinks(true);
@@ -55,7 +69,7 @@
         "</style>"
         "<div align=\"center\"><h1>Hedgewars</h1>"
         "<h3>" + QLabel::tr("Version") + " " + *cVersionString + "</h3>"
-        "<p><a href=\"http://www.hedgewars.org/\">http://www.hedgewars.org/</a></p><br>" +
+        "<p><a href=\"http://www.hedgewars.org/\">http://www.hedgewars.org/</a></p>" +
         QLabel::tr("This program is distributed under the GNU General Public License v2") +
         "</div>"
     );
@@ -68,6 +82,42 @@
     lbl2->setSource(localpage); //sets the source of the label from the file above
     mainLayout->addWidget(lbl2, 1, 1);
 
+    /* Library information */
+
+    QString libinfo = "<style type=text/css>a:link { color: #FFFF6E; }</style>";
+
+#ifdef __GNUC__
+    libinfo.append(QString("Compiler: <a href=\"http://gcc.gnu.org\">GCC</a> %1<br>").arg(__VERSION__));
+#else
+    libinfo.append(QString("Compiler: Unknown<br>").arg(__VERSION__));
+#endif
+
+    libinfo.append(QString("<a href=\"http://www.libsdl.org/\">SDL</a> version: %1.%2.%3<br>")
+        .arg(SDL_MAJOR_VERSION)
+        .arg(SDL_MINOR_VERSION)
+        .arg(SDL_PATCHLEVEL));
+
+    libinfo.append(QString("<a href=\"http://qt-project.org/\">Qt</a> version: %1<br>").arg(QT_VERSION_STR));
+
+#ifdef VIDEOREC
+    libinfo.append(QString("<a href=\"http://libav.org\">Libav</a> version: %1.%2.%3<br>")
+        .arg(LIBAVUTIL_VERSION_MAJOR)
+        .arg(LIBAVUTIL_VERSION_MINOR)
+        .arg(LIBAVUTIL_VERSION_MICRO));
+#endif
+
+    libinfo.append(QString("<a href=\"http://icculus.org/physfs/\">PhysFS</a> version: %1.%2.%3<br>")
+        .arg(PHYSFS_VER_MAJOR)
+        .arg(PHYSFS_VER_MINOR)
+        .arg(PHYSFS_VER_PATCH));
+
+    QLabel * lblLibInfo = new QLabel();
+    lblLibInfo->setText(libinfo);
+    lblLibInfo->setWordWrap(true);
+    lblLibInfo->setMaximumWidth(280);
+    leftLayout->addWidget(lblLibInfo, 0, Qt::AlignTop | Qt::AlignHCenter);
+    leftLayout->addStretch(1);
+
     setAcceptDrops(true);
 }