diff --git a/krusader/DiskUsage/diskusage.cpp b/krusader/DiskUsage/diskusage.cpp
--- a/krusader/DiskUsage/diskusage.cpp
+++ b/krusader/DiskUsage/diskusage.cpp
@@ -954,7 +954,7 @@
 {
     QPixmap icon;
 
-    if (!QPixmapCache::find(mime, icon)) {
+    if (!QPixmapCache::find(mime, &icon)) {
         // get the icon.
         if (mime == "Broken Link !") // FIXME: this doesn't work anymore - the reported mimetype for a broken link is now "unknown"
             icon = FileListIcon("file-broken").pixmap();
diff --git a/krusader/GUI/krstyleproxy.cpp b/krusader/GUI/krstyleproxy.cpp
--- a/krusader/GUI/krstyleproxy.cpp
+++ b/krusader/GUI/krstyleproxy.cpp
@@ -46,7 +46,7 @@
                 else
                     newPen.setColor(Qt::white);
             } else {
-                newPen.setColor(option->palette.foreground().color());
+                newPen.setColor(option->palette.windowText().color());
             }
             newPen.setWidth(0);
             newPen.setStyle(Qt::DotLine);
diff --git a/krusader/Panel/PanelView/krsort.cpp b/krusader/Panel/PanelView/krsort.cpp
--- a/krusader/Panel/PanelView/krsort.cpp
+++ b/krusader/Panel/PanelView/krsort.cpp
@@ -310,15 +310,15 @@
 
 void Sorter::sort()
 {
-    qStableSort(_items.begin(), _items.end(),
+    std::stable_sort(_items.begin(), _items.end(),
                 descending() ? _greaterThanFunc : _lessThanFunc);
 }
 
 int Sorter::insertIndex(FileItem *fileitem, bool isDummy, QVariant customData)
 {
     SortProps props(fileitem,  _viewProperties->sortColumn, _viewProperties, isDummy, !descending(), -1, std::move(customData));
     const QVector<SortProps*>::iterator it =
-        qLowerBound(_items.begin(), _items.end(), &props,
+        std::lower_bound(_items.begin(), _items.end(), &props,
                         descending() ? _greaterThanFunc : _lessThanFunc);
 
     if(it != _items.end())
diff --git a/krusader/Panel/PanelView/krview.cpp b/krusader/Panel/PanelView/krview.cpp
--- a/krusader/Panel/PanelView/krview.cpp
+++ b/krusader/Panel/PanelView/krview.cpp
@@ -344,7 +344,7 @@
     //QPixmapCache::setCacheLimit( ag.readEntry("Icon Cache Size",_IconCacheSize) );
 
     // first try the cache
-    if (!QPixmapCache::find(cacheName, icon)) {
+    if (!QPixmapCache::find(cacheName, &icon)) {
         icon = processIcon(Icon(iconName, Icon("unknown")).pixmap(size),
                            dim, dimColor, dimFactor, fileitem->isSymLink());
         // insert it into the cache
diff --git a/krusader/Panel/listpanelactions.cpp b/krusader/Panel/listpanelactions.cpp
--- a/krusader/Panel/listpanelactions.cpp
+++ b/krusader/Panel/listpanelactions.cpp
@@ -28,8 +28,6 @@
 #include "../KViewer/krviewer.h"
 #include "../icon.h"
 
-// QtCore
-#include <QSignalMapper>
 // QtWidgets
 #include <QActionGroup>
 
@@ -41,17 +39,14 @@
         ActionsBase(parent, mainWindow)
 {
     // set view type
-    auto *mapper = new QSignalMapper(this);
-    connect(mapper, QOverload<int>::of(&QSignalMapper::mapped), this, &ListPanelActions::setView);
     auto *group = new QActionGroup(this);
     group->setExclusive(true);
     QList<KrViewInstance*> views = KrViewFactory::registeredViews();
     for(int i = 0; i < views.count(); i++) {
         KrViewInstance *inst = views[i];
         QAction *action = new QAction(Icon(inst->iconName()), inst->description(), group);
         action->setCheckable(true);
-        connect(action, &QAction::triggered, mapper, QOverload<>::of(&QSignalMapper::map));
-        mapper->setMapping(action, inst->id());
+        connect(action, &QAction::triggered, this, [=] {setView(inst->id());});
         _mainWindow->actions()->addAction("view" + QString::number(i), action);
         _mainWindow->actions()->setDefaultShortcut(action, inst->shortcut());
         setViewActions.insert(inst->id(), action);
diff --git a/krusader/Synchronizer/synchronizergui.cpp b/krusader/Synchronizer/synchronizergui.cpp
--- a/krusader/Synchronizer/synchronizergui.cpp
+++ b/krusader/Synchronizer/synchronizergui.cpp
@@ -117,7 +117,7 @@
         mimeData->setImageData(FileListIcon(isLeft ? "arrow-left-double" : "arrow-right-double").pixmap());
         mimeData->setUrls(urls);
         drag->setMimeData(mimeData);
-        drag->start();
+        drag->exec();
     }
 };