diff --git a/OpenMetaverse/AssetManager.cs b/OpenMetaverse/AssetManager.cs
index aae4cfe0..80654c9f 100644
--- a/OpenMetaverse/AssetManager.cs
+++ b/OpenMetaverse/AssetManager.cs
@@ -402,7 +402,7 @@ namespace OpenMetaverse
         /// <param name="callback">The callback to fire when the simulator responds with the asset data</param>
         public void RequestAsset(UUID assetID, AssetType type, bool priority, AssetReceivedCallback callback)
         {
-            RequestAsset(assetID, type, priority, SourceType.Asset, callback);
+            RequestAsset(assetID, type, priority, SourceType.Asset, UUID.Random(), callback);
         }
 
         /// <summary>
@@ -414,9 +414,22 @@ namespace OpenMetaverse
         /// <param name="sourceType">Source location of the requested asset</param>
         /// <param name="callback">The callback to fire when the simulator responds with the asset data</param>
         public void RequestAsset(UUID assetID, AssetType type, bool priority, SourceType sourceType, AssetReceivedCallback callback)
+        {
+            RequestAsset(assetID, type, priority, sourceType, UUID.Random(), callback);
+        }
+
+        /// <summary>
+        /// Request an asset download
+        /// </summary>
+        /// <param name="assetID">Asset UUID</param>
+        /// <param name="type">Asset type, must be correct for the transfer to succeed</param>
+        /// <param name="priority">Whether to give this transfer an elevated priority</param>
+        /// <param name="sourceType">Source location of the requested asset</param>
+        /// <param name="callback">The callback to fire when the simulator responds with the asset data</param>
+        public void RequestAsset(UUID assetID, AssetType type, bool priority, SourceType sourceType, UUID transactionID, AssetReceivedCallback callback)
         {
             AssetDownload transfer = new AssetDownload();
-            transfer.ID = UUID.Random();
+            transfer.ID = transactionID;
             transfer.AssetID = assetID;
             //transfer.AssetType = type; // Set in TransferInfoHandler.
             transfer.Priority = 100.0f + (priority ? 1.0f : 0.0f);
diff --git a/OpenMetaverseTypes/Parallel.cs b/OpenMetaverseTypes/Parallel.cs
index 62b2cbfa..4e49fc60 100644
--- a/OpenMetaverseTypes/Parallel.cs
+++ b/OpenMetaverseTypes/Parallel.cs
@@ -116,7 +116,6 @@ namespace OpenMetaverse
             int counter = threadCount;
             AutoResetEvent threadFinishEvent = new AutoResetEvent(false);
             IEnumerator<T> enumerator = enumerable.GetEnumerator();
-            object syncRoot = new Object();
             Exception exception = null;
 
             for (int i = 0; i < threadCount; i++)
@@ -130,7 +129,7 @@ namespace OpenMetaverse
                         {
                             T entry;
 
-                            lock (syncRoot)
+                            lock (enumerator)
                             {
                                 if (!enumerator.MoveNext())
                                     break;