diff --git a/Code/Network/RKResponseDescriptor.m b/Code/Network/RKResponseDescriptor.m
index b5092e39..7ef4b385 100644
--- a/Code/Network/RKResponseDescriptor.m
+++ b/Code/Network/RKResponseDescriptor.m
@@ -38,11 +38,11 @@ static NSString * RKStringFromIndexSet(NSIndexSet *indexSet) {
         }
 
         if (range.length == 1) {
-            [string appendFormat:@"%u", range.location];
+            [string appendFormat:@"%lu", (unsigned long) range.location];
         } else {
             NSUInteger firstIndex = range.location;
             NSUInteger lastIndex = firstIndex + range.length - 1;
-            [string appendFormat:@"%u-%u", firstIndex, lastIndex];
+            [string appendFormat:@"%lu-%lu", (unsigned long) firstIndex, (unsigned long) lastIndex];
         }
 
         range.location = nextIndex;
diff --git a/Code/Search/RKSearchIndexer.m b/Code/Search/RKSearchIndexer.m
index aad4bd93..0319a20e 100644
--- a/Code/Search/RKSearchIndexer.m
+++ b/Code/Search/RKSearchIndexer.m
@@ -50,7 +50,7 @@ NSString * const RKSearchableAttributeNamesUserInfoKey = @"RestKitSearchableAttr
                                          userInfo:nil];
         }
 
-        NSAssert(attribute.attributeType == NSStringAttributeType, @"Invalid attribute identifier given: Expected an attribute of type NSStringAttributeType, got %d.", attribute.attributeType);
+        NSAssert(attribute.attributeType == NSStringAttributeType, @"Invalid attribute identifier given: Expected an attribute of type NSStringAttributeType, got %ld.", (unsigned long) attribute.attributeType);
         [attributeNames addObject:attribute.name];
     }
 
@@ -164,12 +164,12 @@ NSString * const RKSearchableAttributeNamesUserInfoKey = @"RestKitSearchableAttr
 {
     NSArray *candidateObjects = [[[NSSet setWithSet:managedObjectContext.insertedObjects] setByAddingObjectsFromSet:managedObjectContext.updatedObjects] allObjects];
     NSUInteger totalObjects = [candidateObjects count];
-    RKLogInfo(@"Indexing %d changed objects in managed object context: %@", totalObjects, managedObjectContext);
+    RKLogInfo(@"Indexing %ld changed objects in managed object context: %@", (unsigned long) totalObjects, managedObjectContext);
 
     for (NSManagedObject *managedObject in candidateObjects) {
         NSUInteger index = [candidateObjects indexOfObject:managedObject];
         double percentage = (((float)index + 1) / (float)totalObjects) * 100;
-        if ((index + 1) % 250 == 0) RKLogInfo(@"Indexed %d of %d (%.2f%% complete)", index + 1, totalObjects, percentage);
+        if ((index + 1) % 250 == 0) RKLogInfo(@"Indexed %ld of %ld (%.2f%% complete)", (unsigned long) index + 1, (unsigned long) totalObjects, percentage);
         NSArray *searchableAttributes = [managedObject.entity.userInfo objectForKey:RKSearchableAttributeNamesUserInfoKey];
         if (! searchableAttributes) {
             RKLogTrace(@"Skipping indexing for managed object for entity '%@': no searchable attributes found.", managedObject.entity.name);
diff --git a/RestKit.xcodeproj/project.pbxproj b/RestKit.xcodeproj/project.pbxproj
index ba98f63a..c851105c 100644
--- a/RestKit.xcodeproj/project.pbxproj
+++ b/RestKit.xcodeproj/project.pbxproj
@@ -562,6 +562,7 @@
 		25E36E0215195CED00F9E448 /* RKFetchRequestMappingCacheTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 25E36E0115195CED00F9E448 /* RKFetchRequestMappingCacheTest.m */; };
 		25E36E0315195CED00F9E448 /* RKFetchRequestMappingCacheTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 25E36E0115195CED00F9E448 /* RKFetchRequestMappingCacheTest.m */; };
 		25E9C8F01612523400647F84 /* RKObjectParameterizationTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 251610261456F2330060A5C5 /* RKObjectParameterizationTest.m */; };
+		25E9C8F1161290D500647F84 /* RKObjectParameterization.m in Sources */ = {isa = PBXBuildFile; fileRef = 254372A715F54995006E8424 /* RKObjectParameterization.m */; };
 		25EC1A3914F72B0900C3CF3F /* RKFetchRequestManagedObjectCache.h in Headers */ = {isa = PBXBuildFile; fileRef = 7394DF3814CF168C00CE7BCE /* RKFetchRequestManagedObjectCache.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		25EC1A3A14F72B0A00C3CF3F /* RKFetchRequestManagedObjectCache.h in Headers */ = {isa = PBXBuildFile; fileRef = 7394DF3814CF168C00CE7BCE /* RKFetchRequestManagedObjectCache.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		25EC1A3B14F72B1300C3CF3F /* RKFetchRequestManagedObjectCache.m in Sources */ = {isa = PBXBuildFile; fileRef = 7394DF3914CF168C00CE7BCE /* RKFetchRequestManagedObjectCache.m */; };
@@ -593,7 +594,7 @@
 		49D2759D14C9EF1E0090845D /* ISO8601DateFormatter.h in Headers */ = {isa = PBXBuildFile; fileRef = 49D2759914C9EF1E0090845D /* ISO8601DateFormatter.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		49D2759E14C9EF1E0090845D /* ISO8601DateFormatter.h in Headers */ = {isa = PBXBuildFile; fileRef = 49D2759914C9EF1E0090845D /* ISO8601DateFormatter.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		49D2759F14C9EF1E0090845D /* ISO8601DateFormatter.m in Sources */ = {isa = PBXBuildFile; fileRef = 49D2759A14C9EF1E0090845D /* ISO8601DateFormatter.m */; settings = {COMPILER_FLAGS = "-fno-objc-arc"; }; };
-		49D275A114C9EF1E0090845D /* ISO8601DateFormatter.m in Sources */ = {isa = PBXBuildFile; fileRef = 49D2759A14C9EF1E0090845D /* ISO8601DateFormatter.m */; };
+		49D275A114C9EF1E0090845D /* ISO8601DateFormatter.m in Sources */ = {isa = PBXBuildFile; fileRef = 49D2759A14C9EF1E0090845D /* ISO8601DateFormatter.m */; settings = {COMPILER_FLAGS = "-fno-objc-arc"; }; };
 		5C927E141608FFFD00DC8B07 /* RKDictionaryUtilitiesTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 5C927E131608FFFD00DC8B07 /* RKDictionaryUtilitiesTest.m */; };
 		5C927E151608FFFD00DC8B07 /* RKDictionaryUtilitiesTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 5C927E131608FFFD00DC8B07 /* RKDictionaryUtilitiesTest.m */; };
 		5CCC295615B7124A0045F0F5 /* RKMacros.h in Headers */ = {isa = PBXBuildFile; fileRef = 5CCC295515B7124A0045F0F5 /* RKMacros.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -2606,6 +2607,7 @@
 				259B96EE1604CCCC0000C250 /* AFURLConnectionOperation.m in Sources */,
 				259B96F21604CCCC0000C250 /* AFXMLRequestOperation.m in Sources */,
 				259B96F41604CCCC0000C250 /* UIImageView+AFNetworking.m in Sources */,
+				25E9C8F1161290D500647F84 /* RKObjectParameterization.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -2841,6 +2843,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
+				CLANG_ENABLE_OBJC_ARC = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -2853,7 +2856,6 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Code/Support/RestKit-Prefix.pch";
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				HEADER_SEARCH_PATHS = "${SDKROOT}/usr/include/libxml2";
 				INFOPLIST_FILE = "Resources/PLISTs/RestKitFramework-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.7;
@@ -2869,6 +2871,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
+				CLANG_ENABLE_OBJC_ARC = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -2882,7 +2885,6 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Code/Support/RestKit-Prefix.pch";
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				HEADER_SEARCH_PATHS = "${SDKROOT}/usr/include/libxml2";
 				INFOPLIST_FILE = "Resources/PLISTs/RestKitFramework-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.7;