## 10.3\. Release History This page summarizes the changes between tagged releases of Go. For full details, see the Mercurial change log. ### 10.3.1\. 2010-11-23 ``` This release includes a backwards-incompatible package change to the sort.Search function (introduced in the last release). See the change for details and examples of how you might change your code: http://code.google.com/p/go/source/detail?r=102866c369 * build: automatically #define _64BIT in 6c. * cgo: print required space after parameter name in wrapper function. * crypto/cipher: new package to replace crypto/block (thanks Adam Langley). * crypto/elliptic: new package, implements elliptic curves over prime fields (thanks Adam Langley). * crypto/x509: policy OID support and fixes (thanks Adam Langley). * doc: add link to codewalks, fix recover() documentation (thanks Anschel Schaffer-Cohen), explain how to write Makefiles for commands. * exec: enable more tests on windows (thanks Alex Brainman). * gc: adjustable hash code in typecheck of composite literals (thanks to vskrap, Andrey Mirtchovski, and Eoghan Sherry). * gc: better error message for bad type in channel send (thanks Anthony Martin). * godoc: bug fix in relativePath, compute search index for all file systems under godoc's observation, use correct time stamp to indicate accuracy of search result. * index/suffixarray: use sort.Search. * net: add ReadFrom and WriteTo windows version (thanks Wei Guangjing). * reflect: remove unnecessary casts in Get methods. * rpc: add RegisterName to allow override of default type name. * runtime: free memory allocated by windows CommandLineToArgv (thanks Alex Brainman). * sort: simplify Search (thanks Roger Peppe). * strings: add LastIndexAny (thanks Benny Siegert). ```