diff -Nru tqt-qt4-3.5.13/debian/changelog tqt-qt4-3.5.13/debian/changelog
--- tqt-qt4-3.5.13/debian/changelog	2011-08-14 00:17:16.000000000 -0500
+++ tqt-qt4-3.5.13/debian/changelog	2011-08-19 13:27:18.000000000 -0500
@@ -1,44 +1,14 @@
-tqt-qt4 (4:3.5.13-0ubuntu7+sr45~natty) natty; urgency=low
+tqt-qt4 (4:3.5.13-0ubuntu7+sr46~natty) natty; urgency=low
 
   * Automated svn build
 
- -- root <kb9vqf@pearsoncomputing.net>  Sun, 14 Aug 2011 00:17:16 -0500
+ -- root <kb9vqf@pearsoncomputing.net>  Fri, 19 Aug 2011 13:27:18 -0500
 
-tqt-qt4 (4:3.5.13-0ubuntu7+sr45~maverick) maverick; urgency=low
+tqt-qt4 (4:3.5.13-0ubuntu7+sr46~maverick) maverick; urgency=low
 
   * Automated svn build
 
- -- root <kb9vqf@pearsoncomputing.net>  Sun, 14 Aug 2011 00:16:20 -0500
-
-tqt-qt4 (4:3.5.13-0ubuntu7+sr44~squeeze) squeeze; urgency=low
-
-  * Automated svn build
-
- -- root <kb9vqf@pearsoncomputing.net>  Sat, 13 Aug 2011 13:09:35 -0500
-
-tqt-qt4 (4:3.5.13-0ubuntu7+sr44~natty) natty; urgency=low
-
-  * Automated svn build
-
- -- root <kb9vqf@pearsoncomputing.net>  Sat, 13 Aug 2011 13:09:10 -0500
-
-tqt-qt4 (4:3.5.13-0ubuntu7+sr44~maverick) maverick; urgency=low
-
-  * Automated svn build
-
- -- root <kb9vqf@pearsoncomputing.net>  Sat, 13 Aug 2011 13:08:45 -0500
-
-tqt-qt4 (4:3.5.13-0ubuntu7+sr44~lucid) lucid; urgency=low
-
-  * Automated svn build
-
- -- root <kb9vqf@pearsoncomputing.net>  Sat, 13 Aug 2011 13:08:21 -0500
-
-tqt-qt4 (4:3.5.13-0ubuntu7+sr44~lenny) lenny; urgency=low
-
-  * Automated svn build
-
- -- root <kb9vqf@pearsoncomputing.net>  Sat, 13 Aug 2011 13:07:26 -0500
+ -- root <kb9vqf@pearsoncomputing.net>  Fri, 19 Aug 2011 13:26:53 -0500
 
 tqt-qt4 (4:3.4.0-0ubuntu0) maverick; urgency=low
 
diff -Nru tqt-qt4-3.5.13/src/kernel/tqinternal.cpp tqt-qt4-3.5.13/src/kernel/tqinternal.cpp
--- tqt-qt4-3.5.13/src/kernel/tqinternal.cpp	2011-08-10 17:56:37.000000000 -0500
+++ tqt-qt4-3.5.13/src/kernel/tqinternal.cpp	2011-08-19 13:21:32.000000000 -0500
@@ -44,6 +44,11 @@
 #include "tqpainter.h"
 #include "tqcleanuphandler.h"
 
+// Modern systems (year 2011) have very large screens in excess of 1000 pixels wide
+// Some may even have screens in excess of 4000 pixels wide(!)
+// Prevent drawing artifacts on such screens
+#define USE_HUGE_QT_SHARED_DOUBLE_BUFFERS 1
+
 static TQPixmap* qdb_shared_pixmap = 0;
 static TQPixmap *qdb_force_pixmap = 0;
 static TQSharedDoubleBuffer* qdb_owner = 0;
@@ -74,9 +79,15 @@
 // static const int sharedLimitWidth = 64;
 // static const int sharedLimitHeight = 20;
 // #else
+#ifdef USE_HUGE_QT_SHARED_DOUBLE_BUFFERS
+// 24M on 32bpp
+static const int sharedLimitWidth = 6400;
+static const int sharedLimitHeight = 1000;
+#else
 // 240K on 32bpp
 static const int sharedLimitWidth = 640;
 static const int sharedLimitHeight = 100;
+#endif
 // #endif
 
 // *******************************************************************
@@ -533,8 +544,13 @@
 	    rw = 4000;	// 32MB seems reasonable enough, but the usage is likely to be wider than it is tall (think of multiple wide monitors)
 	    rh = 2000;
 #else // USE_QT4
+#ifdef USE_HUGE_QT_SHARED_DOUBLE_BUFFERS
+	    rw = TQMIN(rw, 16000);
+	    rh = TQMIN(rh, 16000);
+#else
 	    rw = TQMIN(rw, 8000);
 	    rh = TQMIN(rh, 8000);
+#endif
 #endif // USE_QT4
 	    // need to create a big pixmap and start the cleaner
 	    if ( ! qdb_force_pixmap ) {