diff --git a/libraries/entropy/client/services/ugc/commands.py b/libraries/entropy/client/services/ugc/commands.py
index ccc4eda80..180466366 100644
--- a/libraries/entropy/client/services/ugc/commands.py
+++ b/libraries/entropy/client/services/ugc/commands.py
@@ -12,7 +12,7 @@
 
 import os
 from entropy.exceptions import *
-from entropy.const import etpConst, const_get_stringtype
+from entropy.const import etpConst, const_get_stringtype, const_debug_write
 from entropy.output import darkblue, bold, blue, darkgreen, darkred, brown
 from entropy.i18n import _
 from entropy.core.settings.base import SystemSettings
@@ -96,6 +96,7 @@ class Base:
                 type = "error",
                 header = self.output_header
             )
+            do_skip = True
         elif data != self.Service.answers['ok']:
             mytxt = _("received wrong answer")
 
@@ -140,6 +141,7 @@ class Base:
         try:
             data = self.Service.stream_to_object(data, gzipped)
         except (EOFError, IOError, self.zlib.error, self.dumpTools.pickle.UnpicklingError,):
+            const_debug_write(__name__, self.entropyTools.get_traceback())
             mytxt = _("cannot convert stream into object")
             self.Output.updateProgress(
                 "[%s:%s|%s:%s|%s:%s] %s" % (
diff --git a/libraries/entropy/dump.py b/libraries/entropy/dump.py
index 773f13586..b86995525 100644
--- a/libraries/entropy/dump.py
+++ b/libraries/entropy/dump.py
@@ -23,9 +23,21 @@
 
 """
 
+import sys
 import os
 from entropy.const import etpConst, const_setup_perms, const_setup_file
-import pickle
+# Always use MAX pickle protocol to <=2, to allow Python 2 and 3 support
+COMPAT_PICKLE_PROTOCOL = 2
+
+if sys.hexversion >= 0x3000000:
+    import pickle
+else:
+    try:
+        import cPickle as pickle
+    except ImportError:
+        import pickle
+
+pickle.HIGHEST_PROTOCOL = COMPAT_PICKLE_PROTOCOL
 
 D_EXT = etpConst['cachedumpext']
 D_DIR = etpConst['dumpstoragedir']
@@ -79,7 +91,11 @@ def dumpobj(name, my_object, complete_path = False, ignore_exceptions = True):
 
                 dmpfile = dump_path+D_EXT
             with open(dmpfile, "wb") as dmp_f:
-                pickle.dump(my_object, dmp_f)
+                if sys.hexversion >= 0x3000000:
+                    pickle.dump(my_object, dmp_f,
+                        protocol = COMPAT_PICKLE_PROTOCOL, fix_imports = True)
+                else:
+                    pickle.dump(my_object, dmp_f)
                 dmp_f.flush()
             const_setup_file(dmpfile, E_GID, 0o664)
         except RuntimeError:
@@ -113,7 +129,11 @@ def serialize(myobj, ser_f, do_seek = True):
         race conditions on multi-processing or multi-threading
     @raise pickle.PicklingError: when object cannot be recreated
     """
-    pickle.dump(myobj, ser_f)
+    if sys.hexversion >= 0x3000000:
+        pickle.dump(myobj, ser_f, protocol = COMPAT_PICKLE_PROTOCOL,
+            fix_imports = True)
+    else:
+        pickle.dump(myobj, ser_f)
     ser_f.flush()
     if do_seek:
         ser_f.seek(0)
@@ -129,7 +149,10 @@ def unserialize(serial_f):
     @rtype: any Python pickable object
     @raise pickle.UnpicklingError: when object cannot be recreated
     """
-    return pickle.load(serial_f)
+    if sys.hexversion >= 0x3000000:
+        return pickle.load(serial_f, fix_imports = True)
+    else:
+        return pickle.load(serial_f)
 
 def unserialize_string(mystring):
     """
@@ -141,7 +164,10 @@ def unserialize_string(mystring):
     @rtype: any Python pickable object
     @raise pickle.UnpicklingError: when object cannot be recreated
     """
-    return pickle.loads(mystring)
+    if sys.hexversion >= 0x3000000:
+        return pickle.loads(mystring, fix_imports = True)
+    else:
+        return pickle.loads(mystring)
 
 def serialize_string(myobj):
     """
@@ -153,7 +179,11 @@ def serialize_string(myobj):
     @rtype: string
     @raise pickle.PicklingError: when object cannot be recreated
     """
-    return pickle.dumps(myobj)
+    if sys.hexversion >= 0x3000000:
+        return pickle.dumps(myobj, protocol = COMPAT_PICKLE_PROTOCOL,
+            fix_imports = True)
+    else:
+        return pickle.dumps(myobj)
 
 def loadobj(name, complete_path = False):
     """
@@ -179,7 +209,10 @@ def loadobj(name, complete_path = False):
                 with open(dmpfile, "rb") as dmp_f:
                     obj = None
                     try:
-                        obj = pickle.load(dmp_f)
+                        if sys.hexversion >= 0x3000000:
+                            obj = pickle.load(dmp_f, fix_imports = True)
+                        else:
+                            obj = pickle.load(dmp_f)
                     except (ValueError, EOFError, IOError,
                         OSError, pickle.UnpicklingError, TypeError,
                         AttributeError,):