diff --git a/Makefile b/Makefile
index 69e777b15..a1731b833 100644
--- a/Makefile
+++ b/Makefile
@@ -234,6 +234,7 @@ uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/share/icons/hicolor/*/apps/carla-control.png
 	rm -f $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/carla.svg
 	rm -f $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/carla-control.svg
+	rm -f $(DESTDIR)$(PREFIX)/share/mime/packages/carla.xml
 	rm -f $(DESTDIR)$(PREFIX)/lib/dssi/carla-dssi.so
 	rm -f $(DESTDIR)$(PREFIX)/lib/vst/carla-vst.so
 	rm -rf $(DESTDIR)$(PREFIX)/lib/carla/
diff --git a/source/backend/engine/CarlaEngineJack.cpp b/source/backend/engine/CarlaEngineJack.cpp
index 0f0ee6f7f..5148811b6 100644
--- a/source/backend/engine/CarlaEngineJack.cpp
+++ b/source/backend/engine/CarlaEngineJack.cpp
@@ -1487,11 +1487,8 @@ protected:
         if (fullPortName == nullptr)
             return;
 
-        const size_t groupNameSize(std::strstr(fullPortName, portName) - fullPortName - 1);
-        char         groupName[groupNameSize+1];
-
-        carla_copy<char>(groupName, fullPortName, groupNameSize);
-        groupName[groupNameSize] = '\0';
+        CarlaString groupName(fullPortName);
+        groupName.truncate(groupName.rfind(portName)-1);
 
         int groupId = getGroupId(groupName);
 
@@ -1628,11 +1625,8 @@ protected:
         if (portName == nullptr)
             return;
 
-        const size_t groupNameSize(std::strstr(newName, portName) - newName - 1);
-        char         groupName[groupNameSize+1];
-
-        carla_copy<char>(groupName, newName, groupNameSize);
-        groupName[groupNameSize] = '\0';
+        CarlaString groupName(newName);
+        groupName.truncate(groupName.rfind(portName)-1);
 
         const int groupId(getGroupId(groupName));
 
@@ -1918,14 +1912,14 @@ private:
 
                 const int jackPortFlags(jackbridge_port_flags(jackPort));
 
-                const size_t groupNameSize(std::strstr(fullPortName, portName) - fullPortName - 1);
-                char         groupName[groupNameSize+1];
-                int          groupId = -1;
+                int groupId = -1;
+
+                CarlaString groupName(fullPortName);
+                groupName.truncate(groupName.rfind(portName)-1);
 
-                carla_copy<char>(groupName, fullPortName, groupNameSize);
-                groupName[groupNameSize] = '\0';
+                QString qGroupName(groupName);
 
-                if (parsedGroups.contains(QString(groupName)))
+                if (parsedGroups.contains(qGroupName))
                 {
                     groupId = getGroupId(groupName);
                     CARLA_ASSERT(groupId != -1);
@@ -1933,7 +1927,7 @@ private:
                 else
                 {
                     groupId = fLastGroupId++;
-                    parsedGroups.append(groupName);
+                    parsedGroups.append(qGroupName);
 
                     GroupNameToId groupNameToId(groupId, groupName);
                     fUsedGroupNames.append(groupNameToId);
diff --git a/source/utils/CarlaString.hpp b/source/utils/CarlaString.hpp
index c04922a08..fbadd44c1 100644
--- a/source/utils/CarlaString.hpp
+++ b/source/utils/CarlaString.hpp
@@ -231,6 +231,26 @@ public:
         return 0;
     }
 
+    size_t rfind(const char* const strBuf) const
+    {
+        if (strBuf == nullptr || strBuf[0] == '\0')
+            return bufferLen;
+
+        size_t ret = bufferLen+1;
+        const char* tmpBuf = buffer;
+
+        for (size_t i=0; i < bufferLen; ++i)
+        {
+            if (std::strstr(tmpBuf, strBuf) == nullptr)
+                break;
+
+            --ret;
+            ++tmpBuf;
+        }
+
+        return (ret > bufferLen) ? bufferLen : bufferLen-ret;
+    }
+
     void replace(const char before, const char after)
     {
         if (after == '\0')