diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDbUtils.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDbUtils.java
index 5213ef5cd..182015244 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDbUtils.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDbUtils.java
@@ -78,29 +78,36 @@ public abstract class MongoDbUtils {
 	private static DB doGetDB(Mongo mongo, String databaseName, UserCredentials credentials, boolean allowCreate) {
 
 		DbHolder dbHolder = (DbHolder) TransactionSynchronizationManager.getResource(mongo);
+
 		if (dbHolder != null && !dbHolder.isEmpty()) {
-			// pre-bound Mongo DB
+
 			DB db = null;
+
 			if (TransactionSynchronizationManager.isSynchronizationActive() && dbHolder.doesNotHoldNonDefaultDB()) {
-				// Spring transaction management is active ->
-				db = dbHolder.getDB();
+
+				db = dbHolder.getDB(databaseName);
+
 				if (db != null && !dbHolder.isSynchronizedWithTransaction()) {
-					LOGGER.debug("Registering Spring transaction synchronization for existing Mongo DB");
+
+					LOGGER.debug("Registering Spring transaction synchronization for existing MongoDB {}.", databaseName);
+
 					TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(dbHolder, mongo));
 					dbHolder.setSynchronizedWithTransaction(true);
 				}
 			}
+
 			if (db != null) {
 				return db;
 			}
 		}
 
-		LOGGER.trace("Getting Mongo Database name=[" + databaseName + "]");
-		DB db = mongo.getDB(databaseName);
+		LOGGER.debug("Getting Mongo Database name=[{}]", databaseName);
 
+		DB db = mongo.getDB(databaseName);
 		boolean credentialsGiven = credentials.hasUsername() && credentials.hasPassword();
+
 		if (credentialsGiven && !db.isAuthenticated()) {
-			// Note, can only authenticate once against the same com.mongodb.DB object.
+
 			String username = credentials.getUsername();
 			String password = credentials.hasPassword() ? credentials.getPassword() : null;
 
@@ -113,16 +120,20 @@ public abstract class MongoDbUtils {
 		// Use same Session for further Mongo actions within the transaction.
 		// Thread object will get removed by synchronization at transaction completion.
 		if (TransactionSynchronizationManager.isSynchronizationActive()) {
-			// We're within a Spring-managed transaction, possibly from JtaTransactionManager.
-			LOGGER.debug("Registering Spring transaction synchronization for new Hibernate Session");
+
+			LOGGER.debug("Registering Spring transaction synchronization for MongoDB instance {}.", databaseName);
+
 			DbHolder holderToUse = dbHolder;
+
 			if (holderToUse == null) {
-				holderToUse = new DbHolder(db);
+				holderToUse = new DbHolder(databaseName, db);
 			} else {
-				holderToUse.addDB(db);
+				holderToUse.addDB(databaseName, db);
 			}
+
 			TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(holderToUse, mongo));
 			holderToUse.setSynchronizedWithTransaction(true);
+
 			if (holderToUse != dbHolder) {
 				TransactionSynchronizationManager.bindResource(mongo, holderToUse);
 			}
@@ -146,6 +157,7 @@ public abstract class MongoDbUtils {
 	 * @return whether the DB is transactional
 	 */
 	public static boolean isDBTransactional(DB db, Mongo mongo) {
+
 		if (mongo == null) {
 			return false;
 		}
@@ -159,6 +171,7 @@ public abstract class MongoDbUtils {
 	 * @param db the DB to close (may be <code>null</code>)
 	 */
 	public static void closeDB(DB db) {
+
 		if (db != null) {
 			LOGGER.debug("Closing Mongo DB object");
 			try {
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/MongoDbUtilsUnitTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/MongoDbUtilsUnitTests.java
new file mode 100644
index 000000000..571e82b92
--- /dev/null
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/MongoDbUtilsUnitTests.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
+
+import com.mongodb.DB;
+import com.mongodb.Mongo;
+
+/**
+ * Unit tests for {@link MongoDbUtils}.
+ * 
+ * @author Oliver Gierke
+ */
+public class MongoDbUtilsUnitTests {
+
+	Mongo mongo;
+
+	@Before
+	public void setUp() throws Exception {
+		this.mongo = new Mongo();
+		TransactionSynchronizationManager.initSynchronization();
+	}
+
+	@After
+	public void tearDown() {
+
+		for (Object key : TransactionSynchronizationManager.getResourceMap().keySet()) {
+			TransactionSynchronizationManager.unbindResource(key);
+		}
+
+		TransactionSynchronizationManager.clearSynchronization();
+	}
+
+	@Test
+	public void returnsNewInstanceForDifferentDatabaseName() {
+
+		DB first = MongoDbUtils.getDB(mongo, "first");
+		assertThat(first, is(notNullValue()));
+		assertThat(MongoDbUtils.getDB(mongo, "first"), is(first));
+
+		DB second = MongoDbUtils.getDB(mongo, "second");
+		assertThat(second, is(not(first)));
+		assertThat(MongoDbUtils.getDB(mongo, "second"), is(second));
+	}
+}