--- qt-everywhere-opensource-src-5.4.1/qtwebkit/Source/WebCore/platform/network/MIMEHeader.cpp  2016-06-06 10:50:41.319218164 +0200
+++ qt-everywhere-opensource-src-5.4.1-dev/qtwebkit/Source/WebCore/platform/network/MIMEHeader.cpp  2016-06-06 10:51:19.414216890 +0200
@@ -52,7 +52,7 @@
     while (!(line = buffer->nextChunkAsUTF8StringWithLatin1Fallback()).isNull()) {
         if (line.isEmpty())
             break; // Empty line means end of key/value section.
-        if (line[0] == '\t') {
+        if (line[0] == '\t' || line[0] == ' ') {
             ASSERT(!key.isEmpty());
             value.append(line.substring(1));
             continue;
--- qt-everywhere-opensource-src-5.4.1/qtwebengine/src/3rdparty/chromium/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp  2016-06-05 22:34:52.151528980 +0200
+++ qt-everywhere-opensource-src-5.4.1-dev/qtwebengine/src/3rdparty/chromium/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp  2016-06-05 22:35:25.588509087 +0200
@@ -96,7 +96,7 @@
     while (!(line = buffer->nextChunkAsUTF8StringWithLatin1Fallback()).isNull()) {
         if (line.isEmpty())
             break; // Empty line means end of key/value section.
-        if (line[0] == '\t') {
+        if (line[0] == '\t' || line[0] == ' ') {
             ASSERT(!key.isEmpty());
             value.append(line.substring(1));
             continue;