diff --git a/retroshare-gui/src/gui/FileTransfer/DLListDelegate.cpp b/retroshare-gui/src/gui/FileTransfer/DLListDelegate.cpp
index 0a0c2b4c5..44d8580f0 100755
--- a/retroshare-gui/src/gui/FileTransfer/DLListDelegate.cpp
+++ b/retroshare-gui/src/gui/FileTransfer/DLListDelegate.cpp
@@ -95,7 +95,7 @@ void DLListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 				for(int i = 0; i < 4; ++i) {
 					if (fileSize < 1024) {
 						fileSize = index.data().toLongLong();
-						temp.sprintf("%.2f ", fileSize / multi);
+						temp = QString::asprintf("%.2f ", fileSize / multi);
 						temp += byteUnits[i];
 						break;
 					}
@@ -114,7 +114,7 @@ void DLListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 				for(int i = 0; i < 4; ++i) {
 					if (remaining < 1024) {
 						remaining = index.data().toLongLong();
-						temp.sprintf("%.2f ", remaining / multi);
+						temp = QString::asprintf("%.2f ", remaining / multi);
 						temp += byteUnits[i];
 						break;
 					}
@@ -133,7 +133,7 @@ void DLListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 				for(int i = 0; i < 4; ++i) {
 					if (completed < 1024) {
 						completed = index.data().toLongLong();
-						temp.sprintf("%.2f ", completed / multi);
+						temp = QString::asprintf("%.2f ", completed / multi);
 						temp += byteUnits[i];
 						break;
 					}
@@ -149,7 +149,7 @@ void DLListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
                             temp = "";
                         } else {
                             temp.clear();
-                            temp.sprintf("%.2f", dlspeed/1024.);
+                            temp = QString::asprintf("%.2f", dlspeed/1024.);
                             temp += " KB/s";
                         }
 			painter->drawText(option.rect, Qt::AlignRight | Qt::AlignVCenter, temp);
diff --git a/retroshare-gui/src/gui/FileTransfer/ULListDelegate.cpp b/retroshare-gui/src/gui/FileTransfer/ULListDelegate.cpp
index 8bddc5017..377205d3e 100755
--- a/retroshare-gui/src/gui/FileTransfer/ULListDelegate.cpp
+++ b/retroshare-gui/src/gui/FileTransfer/ULListDelegate.cpp
@@ -93,7 +93,7 @@ void ULListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 				for(int i = 0; i < 4; ++i) {
 					if (fileSize < 1024) {
 						fileSize = index.data().toLongLong();
-						temp.sprintf("%.2f ", fileSize / multi);
+						temp = QString::asprintf("%.2f ", fileSize / multi);
 						temp += byteUnits[i];
 						break;
 					}
@@ -112,7 +112,7 @@ void ULListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 				for(int i = 0; i < 4; ++i) {
 					if (transferred < 1024) {
 						transferred = index.data().toLongLong();
-						temp.sprintf("%.2f ", transferred / multi);
+						temp = QString::asprintf("%.2f ", transferred / multi);
 						temp += byteUnits[i];
 						break;
 					}
@@ -128,7 +128,7 @@ void ULListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
                             temp = "";
                         } else {
                             temp.clear();
-                            temp.sprintf("%.2f", ulspeed/1024.);
+                            temp = QString::asprintf("%.2f", ulspeed/1024.);
                             temp += " KB/s";
                         }
 			painter->drawText(option.rect, Qt::AlignRight | Qt::AlignVCenter, temp);
diff --git a/retroshare-gui/src/gui/TheWire/PulseViewItem.cpp b/retroshare-gui/src/gui/TheWire/PulseViewItem.cpp
index 5a309f94b..b46737bfd 100644
--- a/retroshare-gui/src/gui/TheWire/PulseViewItem.cpp
+++ b/retroshare-gui/src/gui/TheWire/PulseViewItem.cpp
@@ -450,15 +450,15 @@ QString ToNumberUnits(uint32_t count)
 	QString ans;
 	if (count > 1000000)
 	{
-		ans.sprintf("%6.2fm", count / 1000000.0);
+		ans = QString::asprintf("%6.2fm", count / 1000000.0);
 	}
 	else if (count > 1000)
 	{
-		ans.sprintf("%6.2fk", count / 1000.0);
+		ans = QString::asprintf("%6.2fk", count / 1000.0);
 	}
 	else
 	{
-		ans.sprintf("%6d", count);
+		ans = QString::asprintf("%6d", count);
 	}
 	return ans;
 }
diff --git a/retroshare-gui/src/gui/statistics/BwCtrlWindow.cpp b/retroshare-gui/src/gui/statistics/BwCtrlWindow.cpp
index 7d030a9f1..7eec812ac 100644
--- a/retroshare-gui/src/gui/statistics/BwCtrlWindow.cpp
+++ b/retroshare-gui/src/gui/statistics/BwCtrlWindow.cpp
@@ -96,12 +96,12 @@ void BWListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 
 	switch(index.column()) {
 	case COLUMN_IN_RATE:
-		temp.sprintf("%.3f ", index.data().toFloat());
+		temp = QString::asprintf("%.3f ", index.data().toFloat());
 		//temp=QString::number(index.data().toFloat());
 		painter->drawText(option.rect, Qt::AlignRight, temp);
 		break;
 	case COLUMN_IN_MAX:
-		temp.sprintf("%.3f ", index.data().toFloat());
+		temp = QString::asprintf("%.3f ", index.data().toFloat());
 		//temp=QString::number(index.data().toFloat());
 		painter->drawText(option.rect, Qt::AlignRight, temp);
 		break;
@@ -112,7 +112,7 @@ void BWListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 	case COLUMN_IN_ALLOC:
 		flValue = index.data().toFloat();
 		if (flValue < std::numeric_limits<float>::max()){
-			temp.sprintf("%.3f ", flValue);
+			temp = QString::asprintf("%.3f ", flValue);
 		} else {
 			temp=strNA;
 		}
@@ -128,12 +128,12 @@ void BWListDelegate::paint(QPainter * painter, const QStyleOptionViewItem & opti
 		painter->drawText(option.rect, Qt::AlignRight, temp);
 		break;
 	case COLUMN_OUT_RATE:
-		temp.sprintf("%.3f ", index.data().toFloat());
+		temp = QString::asprintf("%.3f ", index.data().toFloat());
 		//temp=QString::number(index.data().toFloat());
 		painter->drawText(option.rect, Qt::AlignRight, temp);
 		break;
 	case COLUMN_OUT_MAX:
-		temp.sprintf("%.3f ", index.data().toFloat());
+		temp = QString::asprintf("%.3f ", index.data().toFloat());
 		//temp=QString::number(index.data().toFloat());
 		painter->drawText(option.rect, Qt::AlignRight, temp);
 		break;