Fixed bugs:

• Issue #164: file buffered port isn't flushed when GCed.
• Issue #165: syntax-case returns identifier even it's not macro expansion phase
• fxior, fxand and fxxor returned invalid value when more than 2 arguments have passed and one of them wasn't a fixnum
• lucas-lehmer? test returned #f even the given argument is prime number.

New improvements:

• VM dispatch is 5% faster.
• (asin 0) and (acos 1) return exact integer.
• Reduced stack overflow during compilation
• Improved performance of free-identifier=?.
• Compiler removes when expression like this : (lambda () (when #f #t) 'ok).
• Removed exists and lset-union procedure from compiler for better performance.
• Pointer object can be passed for FFI type wchar_t*.
• Referring callback type of FFI structure now returns callback object even if it's not created on Scheme world.

New freatures:

• Generator library (sagittarius generators) and draft SRFI-121 have been added.
• fold2 and fold3 procedures have been added to (util list).
• Base64 port operations procedures open-base64-encode-output-port, open-base64-encode-input-port, open-base64-decode-output-port, and open-base64-decode-input-port have been added.
• delete-file procedure show better error message when it failed to delete the given file.
• SQL parser and serializer have been added to (text sql) (not documented and still experimental).
• Added bunch of Windows message constants.
• vector-sort and vector-sort! now accepts optional arguments start and end according to draft SRFI 132.