diff --git a/PdfForQtLib/PdfForQtLib.pro b/PdfForQtLib/PdfForQtLib.pro
index f82ec4b..e91610f 100644
--- a/PdfForQtLib/PdfForQtLib.pro
+++ b/PdfForQtLib/PdfForQtLib.pro
@@ -130,6 +130,11 @@ LIBS += -L$$PDFFORQT_DEPENDENCIES_PATH/libjpeg/bin/ -ljpeg
 INCLUDEPATH += $$PDFFORQT_DEPENDENCIES_PATH/libjpeg/include
 DEPENDPATH += $$PDFFORQT_DEPENDENCIES_PATH/libjpeg/include
 
+# Add libjpeg to installations
+libjpeg.files = $$PDFFORQT_DEPENDENCIES_PATH/libjpeg/bin/jpeg.dll
+libjpeg.path = $$DESTDIR/install
+INSTALLS += libjpeg
+
 # Link OpenSSL
 LIBS += -L$$PDFFORQT_DEPENDENCIES_PATH/OpenSSL/ -llibcrypto -llibssl
 INCLUDEPATH += $$PDFFORQT_DEPENDENCIES_PATH/OpenSSL/include
diff --git a/PdfForQtLib/sources/pdfimage.cpp b/PdfForQtLib/sources/pdfimage.cpp
index 15bfe8a..35babf9 100644
--- a/PdfForQtLib/sources/pdfimage.cpp
+++ b/PdfForQtLib/sources/pdfimage.cpp
@@ -464,7 +464,7 @@ PDFImage PDFImage::createImage(const PDFDocument* document, const PDFStream* str
             }
         }
     }
-    else if (imageFilterName == "CCITTFaxDecode")
+    else if (imageFilterName == "CCITTFaxDecode" || imageFilterName == "CCF")
     {
         throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Not implemented image filter 'CCITFaxDecode'."));
     }
diff --git a/PdfForQtLib/sources/pdfpagecontentprocessor.cpp b/PdfForQtLib/sources/pdfpagecontentprocessor.cpp
index 9d89ae3..c05656e 100644
--- a/PdfForQtLib/sources/pdfpagecontentprocessor.cpp
+++ b/PdfForQtLib/sources/pdfpagecontentprocessor.cpp
@@ -200,7 +200,6 @@ PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page,
     m_textBeginEndState(0),
     m_compatibilityBeginEndState(0),
     m_drawingUncoloredTilingPatternState(0),
-    m_isWarningColorOperatorsInUncoloredTilingPatternReported(false),
     m_patternBaseMatrix(pagePointToDevicePointMatrix),
     m_pagePointToDevicePointMatrix(pagePointToDevicePointMatrix),
     m_meshQualitySettings(meshQualitySettings)
@@ -1628,6 +1627,15 @@ void PDFPageContentProcessor::setRenderingIntentByName(QByteArray renderingInten
     m_graphicState.setRenderingIntentName(renderingIntentName);
 }
 
+void PDFPageContentProcessor::reportRenderErrorOnce(RenderErrorType type, QString message)
+{
+    if (!m_onceReportedErrors.count(message))
+    {
+        m_onceReportedErrors.insert(message);
+        reportRenderError(type, message);
+    }
+}
+
 void PDFPageContentProcessor::processApplyGraphicState(const PDFDictionary* graphicStateDictionary)
 {
     PDFDocumentDataLoaderDecorator loader(m_document);
@@ -1717,7 +1725,7 @@ void PDFPageContentProcessor::processApplyGraphicState(const PDFDictionary* grap
         bool isNone = (softMaskObject.isName() && softMaskObject.getString() == "None");
         if (!isNone)
         {
-            reportRenderError(RenderErrorType::NotSupported, PDFTranslationContext::tr("Soft masks not supported."));
+            reportRenderErrorOnce(RenderErrorType::NotSupported, PDFTranslationContext::tr("Soft masks not supported."));
         }
     }
 }
@@ -2679,11 +2687,7 @@ void PDFPageContentProcessor::paintXObjectImage(const PDFStream* stream)
 
 void PDFPageContentProcessor::reportWarningAboutColorOperatorsInUTP()
 {
-    if (!m_isWarningColorOperatorsInUncoloredTilingPatternReported)
-    {
-        m_isWarningColorOperatorsInUncoloredTilingPatternReported = true;
-        m_errorList.push_back(PDFRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Color operators are not allowed in uncolored tilling pattern.")));
-    }
+    reportRenderErrorOnce(RenderErrorType::Warning, PDFTranslationContext::tr("Color operators are not allowed in uncolored tilling pattern."));
 }
 
 void PDFPageContentProcessor::operatorPaintXObject(PDFPageContentProcessor::PDFOperandName name)
diff --git a/PdfForQtLib/sources/pdfpagecontentprocessor.h b/PdfForQtLib/sources/pdfpagecontentprocessor.h
index 9c4b924..28cf854 100644
--- a/PdfForQtLib/sources/pdfpagecontentprocessor.h
+++ b/PdfForQtLib/sources/pdfpagecontentprocessor.h
@@ -168,6 +168,10 @@ public:
 
     virtual void reportRenderError(RenderErrorType type, QString message) override;
 
+    /// Reports render error, but only once - if same error was already reported,
+    /// then no new error is reported.
+    void reportRenderErrorOnce(RenderErrorType type, QString message);
+
 protected:
 
     class PDFLineDashPattern
@@ -883,9 +887,6 @@ private:
     /// Is drawing uncolored tiling pattern?
     int m_drawingUncoloredTilingPatternState;
 
-    /// Is warning about uncolored tiling patterns reported?
-    bool m_isWarningColorOperatorsInUncoloredTilingPatternReported;
-
     /// Actually realized physical font
     PDFCachedItem<PDFRealizedFontPointer> m_realizedFont;
 
@@ -906,6 +907,9 @@ private:
 
     /// Mesh quality settings
     PDFMeshQualitySettings m_meshQualitySettings;
+
+    /// Set with rendering errors, which were reported (and should be reported once)
+    std::set<QString> m_onceReportedErrors;
 };
 
 }   // namespace pdf
diff --git a/PdfForQtLib/sources/pdfpainter.cpp b/PdfForQtLib/sources/pdfpainter.cpp
index 70ccc1d..5660205 100644
--- a/PdfForQtLib/sources/pdfpainter.cpp
+++ b/PdfForQtLib/sources/pdfpainter.cpp
@@ -199,14 +199,14 @@ void PDFPainter::performUpdateGraphicsState(const PDFPageContentProcessorState&
 
             if (!PDFBlendModeInfo::isSupportedByQt(blendMode))
             {
-                reportRenderError(RenderErrorType::NotSupported, PDFTranslationContext::tr("Blend mode '%1' not supported.").arg(PDFBlendModeInfo::getBlendModeName(blendMode)));
+                reportRenderErrorOnce(RenderErrorType::NotSupported, PDFTranslationContext::tr("Blend mode '%1' not supported.").arg(PDFBlendModeInfo::getBlendModeName(blendMode)));
             }
 
             m_painter->setCompositionMode(compositionMode);
         }
         else if (blendMode != BlendMode::Normal && blendMode != BlendMode::Compatible)
         {
-            reportRenderError(RenderErrorType::NotSupported, PDFTranslationContext::tr("Blend mode '%1' is in transparency group, which is not supported.").arg(PDFBlendModeInfo::getBlendModeName(blendMode)));
+            reportRenderErrorOnce(RenderErrorType::NotSupported, PDFTranslationContext::tr("Blend mode '%1' is in transparency group, which is not supported.").arg(PDFBlendModeInfo::getBlendModeName(blendMode)));
         }
     }
 
@@ -366,7 +366,4 @@ bool PDFPainter::canSetBlendMode(BlendMode mode) const
     return std::all_of(m_transparencyGroupDataStack.cbegin(), m_transparencyGroupDataStack.cend(), [](const PDFTransparencyGroupPainterData& group) { return group.blendMode == BlendMode::Normal || group.blendMode == BlendMode::Compatible; });
 }
 
-// TODO: Check all graphic state parameter dictionaries, warn about missing ones
-// TODO: Recompile libraries in MSVC 2019
-
 }   // namespace pdf