diff --git a/apps/converter/backends/graphicsmagick/base.py b/apps/converter/backends/graphicsmagick/base.py
index 1d70108a94..d4d720b894 100644
--- a/apps/converter/backends/graphicsmagick/base.py
+++ b/apps/converter/backends/graphicsmagick/base.py
@@ -33,24 +33,26 @@ class ConverterClass(ConverterBase):
     def convert_file(self, input_filepath, output_filepath, transformations=None, page=DEFAULT_PAGE_NUMBER, file_format=DEFAULT_FILE_FORMAT):
         arguments = []
 
+        try:
+            if transformations:
+                for transformation in transformations:
+                    if transformation['transformation'] == TRANSFORMATION_RESIZE:
+                        dimensions = []
+                        dimensions.append(unicode(transformation['arguments']['width']))
+                        if 'height' in transformation['arguments']:
+                            dimensions.append(unicode(transformation['arguments']['height']))
+                        arguments.append(u'-resize')
+                        arguments.append(u'%s' % DIMENSION_SEPARATOR.join(dimensions))
 
-        if transformations:
-            for transformation in transformations:
-                if transformation['transformation'] == TRANSFORMATION_RESIZE:
-                    dimensions = []
-                    dimensions.append(unicode(transformation['arguments']['width']))
-                    if 'height' in transformation['arguments']:
-                        dimensions.append(unicode(transformation['arguments']['height']))
-                    arguments.append(u'-resize')
-                    arguments.append(u'%s' % DIMENSION_SEPARATOR.join(dimensions))
+                    elif transformation['transformation'] == TRANSFORMATION_ZOOM:
+                        arguments.append(u'-resize')
+                        arguments.append(u'%d%%' % transformation['arguments']['percent'])
 
-                elif transformation['transformation'] == TRANSFORMATION_ZOOM:
-                    arguments.append(u'-resize')
-                    arguments.append(u'%d%%' % transformation['arguments']['percent'])
-
-                elif transformation['transformation'] == TRANSFORMATION_ROTATE:
-                    arguments.append(u'-rotate')
-                    arguments.append(u'%s' % transformation['arguments']['degrees'])
+                    elif transformation['transformation'] == TRANSFORMATION_ROTATE:
+                        arguments.append(u'-rotate')
+                        arguments.append(u'%s' % transformation['arguments']['degrees'])
+        except:
+            pass
 
         if file_format.lower() == u'jpeg' or file_format.lower() == u'jpg':
             arguments.append(u'-quality')
diff --git a/apps/converter/backends/imagemagick/base.py b/apps/converter/backends/imagemagick/base.py
index 977da783c2..e55923de2b 100644
--- a/apps/converter/backends/imagemagick/base.py
+++ b/apps/converter/backends/imagemagick/base.py
@@ -31,23 +31,26 @@ class ConverterClass(ConverterBase):
 
     def convert_file(self, input_filepath, output_filepath, transformations=None, page=DEFAULT_PAGE_NUMBER, file_format=DEFAULT_FILE_FORMAT):
         arguments = []
-        if transformations:
-            for transformation in transformations:
-                if transformation['transformation'] == TRANSFORMATION_RESIZE:
-                    dimensions = []
-                    dimensions.append(unicode(transformation['arguments']['width']))
-                    if 'height' in transformation['arguments']:
-                        dimensions.append(unicode(transformation['arguments']['height']))                    
-                    arguments.append(u'-resize')
-                    arguments.append(u'%s' % DIMENSION_SEPARATOR.join(dimensions))
+        try:
+            if transformations:
+                for transformation in transformations:
+                    if transformation['transformation'] == TRANSFORMATION_RESIZE:
+                        dimensions = []
+                        dimensions.append(unicode(transformation['arguments']['width']))
+                        if 'height' in transformation['arguments']:
+                            dimensions.append(unicode(transformation['arguments']['height']))                    
+                        arguments.append(u'-resize')
+                        arguments.append(u'%s' % DIMENSION_SEPARATOR.join(dimensions))
 
-                elif transformation['transformation'] == TRANSFORMATION_ZOOM:
-                    arguments.append(u'-resize')
-                    arguments.append(u'%d%%' % transformation['arguments']['percent'])
-                    
-                elif transformation['transformation'] == TRANSFORMATION_ROTATE:
-                    arguments.append(u'-rotate')
-                    arguments.append(u'%s' % transformation['arguments']['degrees'])
+                    elif transformation['transformation'] == TRANSFORMATION_ZOOM:
+                        arguments.append(u'-resize')
+                        arguments.append(u'%d%%' % transformation['arguments']['percent'])
+                        
+                    elif transformation['transformation'] == TRANSFORMATION_ROTATE:
+                        arguments.append(u'-rotate')
+                        arguments.append(u'%s' % transformation['arguments']['degrees'])
+        except:
+            pass
                     
         if file_format.lower() == u'jpeg' or file_format.lower() == u'jpg':
             arguments.append(u'-quality')
diff --git a/apps/converter/backends/python/base.py b/apps/converter/backends/python/base.py
index e4affcb7fe..71386bf345 100644
--- a/apps/converter/backends/python/base.py
+++ b/apps/converter/backends/python/base.py
@@ -100,20 +100,25 @@ class ConverterClass(ConverterBase):
                 # do something to im
         except EOFError:
             pass # end of sequence        
-
-        if transformations:
-            aspect = 1.0 * im.size[0] / im.size[1]
-            for transformation in transformations:
-                if transformation['transformation'] == TRANSFORMATION_RESIZE:
-                    width = int(transformation['arguments']['width'])
-                    height = int(transformation['arguments'].get('height', 1.0 * width * aspect))
-                    im = self.resize(im, (width, height))
-                elif transformation['transformation'] == TRANSFORMATION_ZOOM:
-                    decimal_value = float(transformation['arguments']['percent']) / 100
-                    im = im.transform((im.size[0] * decimal_value, im.size[1] * decimal_value), Image.EXTENT, (0, 0, im.size[0], im.size[1])) 
-                elif transformation['transformation'] == TRANSFORMATION_ROTATE:
-                    # PIL counter degress counter-clockwise, reverse them
-                    im = im.rotate(360 - transformation['arguments']['degrees'])
+        
+        try:
+            if transformations:
+                aspect = 1.0 * im.size[0] / im.size[1]
+                for transformation in transformations:
+                    arguments = transformation.get('arguments')
+                    if transformation['transformation'] == TRANSFORMATION_RESIZE:
+                        width = int(arguments.get('width', 0))
+                        height = int(arguments.get('height', 1.0 * width * aspect))
+                        im = self.resize(im, (width, height))
+                    elif transformation['transformation'] == TRANSFORMATION_ZOOM:
+                        decimal_value = float(arguments.get('percent', 100)) / 100
+                        im = im.transform((im.size[0] * decimal_value, im.size[1] * decimal_value), Image.EXTENT, (0, 0, im.size[0], im.size[1])) 
+                    elif transformation['transformation'] == TRANSFORMATION_ROTATE:
+                        # PIL counter degress counter-clockwise, reverse them
+                        im = im.rotate(360 - arguments.get('degrees', 0))
+        except:
+            # Ignore all transformation error
+            pass
 
         if im.mode not in ('L', 'RGB'):
             im = im.convert('RGB')
@@ -177,3 +182,6 @@ class ConverterClass(ConverterBase):
             img.save(out, 'JPEG', quality=75)
         else:
             return img
+
+        #if isinstance(self.regex, basestring):
+        #    self.regex = re.compile(regex)