diff --git a/rtdata/profiles/Auto-Matched Curve - ISO High.pp3 b/rtdata/profiles/Auto-Matched Curve - ISO High.pp3
index 6108ea54c..99f0af8fe 100644
--- a/rtdata/profiles/Auto-Matched Curve - ISO High.pp3	
+++ b/rtdata/profiles/Auto-Matched Curve - ISO High.pp3	
@@ -31,7 +31,7 @@ CCCurve=0;
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtdata/profiles/Auto-Matched Curve - ISO Low.pp3 b/rtdata/profiles/Auto-Matched Curve - ISO Low.pp3
index d8be8d795..882c0130f 100644
--- a/rtdata/profiles/Auto-Matched Curve - ISO Low.pp3	
+++ b/rtdata/profiles/Auto-Matched Curve - ISO Low.pp3	
@@ -10,7 +10,7 @@ Method=Blend
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtdata/profiles/Auto-Matched Curve - ISO Medium.pp3 b/rtdata/profiles/Auto-Matched Curve - ISO Medium.pp3
index a976fdd90..f9196bb30 100644
--- a/rtdata/profiles/Auto-Matched Curve - ISO Medium.pp3	
+++ b/rtdata/profiles/Auto-Matched Curve - ISO Medium.pp3	
@@ -32,7 +32,7 @@ CCCurve=0;
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtdata/profiles/Standard Film Curve - ISO High.pp3 b/rtdata/profiles/Standard Film Curve - ISO High.pp3
index ae134e7f4..4dd3a9b1d 100644
--- a/rtdata/profiles/Standard Film Curve - ISO High.pp3	
+++ b/rtdata/profiles/Standard Film Curve - ISO High.pp3	
@@ -34,7 +34,7 @@ CCCurve=0;
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtdata/profiles/Standard Film Curve - ISO Low.pp3 b/rtdata/profiles/Standard Film Curve - ISO Low.pp3
index 4f6ad62c2..c23b5b8a4 100644
--- a/rtdata/profiles/Standard Film Curve - ISO Low.pp3	
+++ b/rtdata/profiles/Standard Film Curve - ISO Low.pp3	
@@ -12,7 +12,7 @@ Method=Blend
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtdata/profiles/Standard Film Curve - ISO Medium.pp3 b/rtdata/profiles/Standard Film Curve - ISO Medium.pp3
index 4921ffb22..4aff630f5 100644
--- a/rtdata/profiles/Standard Film Curve - ISO Medium.pp3	
+++ b/rtdata/profiles/Standard Film Curve - ISO Medium.pp3	
@@ -34,7 +34,7 @@ CCCurve=0;
 LcMode=lfauto
 UseDistortion=true
 UseVignette=true
-UseCA=true
+UseCA=false
 
 [Color Management]
 ToneCurve=false
diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 7aab3b0bd..55acf8307 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -1209,6 +1209,11 @@ Camera constants:
         "ranges": { "white": 4050 }
     },
 
+    { // Quality C
+        "make_model": "Canon PowerShot SX50 HS",
+        "ranges": { "white": 4050 }
+    },
+
     { // Quality B
         "make_model": "Canon PowerShot SX60 HS",
         "dcraw_matrix": [ 13161,-5451,-1344,-1989,10654,1531,-47,1271,4955 ], // DNG_V8.7 D65
diff --git a/rtengine/rawimagesource.cc b/rtengine/rawimagesource.cc
index 74684d05d..514680545 100644
--- a/rtengine/rawimagesource.cc
+++ b/rtengine/rawimagesource.cc
@@ -474,7 +474,7 @@ RawImageSource::~RawImageSource()
         delete riFrames[i];
     }
 
-    for (size_t i = 0; i < numFrames - 1; ++i) {
+    for(size_t i = 0; i + 1 < numFrames; ++i) {
         delete rawDataBuffer[i];
     }
 
diff --git a/rtgui/filepanel.cc b/rtgui/filepanel.cc
index 23b7c3983..aef2b0a22 100644
--- a/rtgui/filepanel.cc
+++ b/rtgui/filepanel.cc
@@ -301,7 +301,7 @@ bool FilePanel::imageLoaded( Thumbnail* thm, ProgressConnector<rtengine::Initial
 #ifdef WIN32
                     else {
                         Glib::ustring msg_ = Glib::ustring("<b>") + M("MAIN_MSG_CANNOTLOAD") + " \"" + thm->getFileName() + "\" .\n" + M("MAIN_MSG_TOOMANYOPENEDITORS") + "</b>";
-                        Gtk::MessageDialog msgd (msg_, true, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
+                        Gtk::MessageDialog msgd (*parent, msg_, true, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
                         msgd.run ();
                         goto MAXGDIHANDLESREACHED;
                     }
@@ -322,7 +322,7 @@ bool FilePanel::imageLoaded( Thumbnail* thm, ProgressConnector<rtengine::Initial
             }
         } else {
             Glib::ustring msg_ = Glib::ustring("<b>") + M("MAIN_MSG_CANNOTLOAD") + " \"" + thm->getFileName() + "\" .\n</b>";
-            Gtk::MessageDialog msgd (msg_, true, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
+            Gtk::MessageDialog msgd (*parent, msg_, true, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
             msgd.run ();
         }
 #ifdef WIN32