[GAE/J] Google App Engine Java SDK 1.7.3 がリリースされました

Google App Engine Java SDK 1.7.3がリリースされました。
リリースノートは以下。

We encourage you to try and test your application using Java 7 and the App Engine SDK. Note that Java 7 is not a supported runtime. 
Java 7 Features that we encourage you to try in dev appserver: 
Strings in switch 
Binary integral literals and underscores in number literals 
Multi-catch and more precise rethrow 
Improved type inference for generic instance creation (diamond) 
try-with-resources statement 
Simplified varargs method invocation 
Java 7 features that are NOT supported: 
All new Java 7 classes (the Google App Engine whitelist has not been updated yet) 
Method Handles 
Invoke Dynamic bytecode 
InetAddress name resolution now displays UnknownHostException instead of a runtime exception error when the host is unknown. 
Datastore Index stats now report type instead of representation-type. 
Class Loading Priority can now be granted to specific JAR files by adding class-loader-config element in appengine-web.xml file. This is an experimental feature. 
Queries with transactions are now fully checked for consistency in Remote API. 
Global Consistent Indexes are now deprecated in the Search API. 
ListResponse<Document> listDocuments(ListRequest) has been deprecated and replaced with GetResponse<Document> getRange(GetRequest) in the Search API. 
ListIndexesReponse listIndexes(ListIndexesRequest) has been deprecated and replaced with GetResponse<Index> getIndexes(GetIndexesRequest) in the Search API. 
getField(String) has been deprecated and aliased to getFields(String) in the Search API. 
AddResponse Index.add() has been deprecated and renamed to PutResponse Index.put() in the Search API. 
RemoveResponse Index.remove() has been deprecated and renamed to DeleteReponse Index.delete() in the Search API. 
Users can now change authentication options after app creation 
http://code.google.com/p/googleappengine/issues/detail?id=483 
Fixed an issue with Channel API breaking when using urlfetch service. This issue was limited to the SDK. 
http://code.google.com/p/googleappengine/issues/detail?id=8166 
Fixed an issue with ResponseRewriterFilter not being threadsafe when using Remote API. 
http://code.google.com/p/googleappengine/issues/detail?id=8167 

SdkForJavaReleaseNotes - googleappengine - Google App Engine Java SDK Release Notes - Google App Engine - Google Project Hosting

http://code.google.com/p/googleappengine/wiki/SdkForJavaReleaseNotes

Java 7に関するアップデートのようです。
Java 7からサポートされているランタイムは未サポートとのことなので、Java 7にするのはもう少し待ったほうが良いのかなぁ。

GAE,Java