* The MAC OS X YOSEMITE compatibility problems are fixed. We
bundled a patched Pango text-drawing library with Racket.
* The WINDOWS [32-bit] releases fixes the window-update crashes.
We bundled a patched Cairo drawing library with Racket.
* TYPED RACKET closes two safety holes in the exception system.
The revised type system restricts `raise' to send only
instances of the `exn' structure type and flat data to
handlers. It also checks exception handlers properly.
NOTE: Previously well-typed programs may fail to typecheck.
* TYPED RACKET'S typed regions support casts and predicates.
* 2HTDP/IMAGE'S notion of equality ignores an image's baseline.
* The PACKAGE MANAGER supports a binary library installation mode,
which allows users to install packages without source or documentation.
Use the `--binary-lib' option with `raco pkg install'.
* The new DRRACKET-TOOL-LIB package factors out parts of DrRacket's
IDE so that they can be reused with other editors, such as Emacs.
* The COMPILER'S use-before-defined analysis has been repaired for
certain forms of nested `letrec', some `let' forms, and some
uses of `set!' or `with-continuation-mark'.
* The COMPILER performs additional bytecode optimizations.
Thanks to Gustavo Massaccesi.
* The CML library comes with a new `replace-evt' event constructor.
Thanks to Jan Dvořák.
* REDEX'S benchmark suite comes with a description of the benchmark
* REDEX'S metafunctions can be typeset using the "large left brace"
notation for conditionals.
* The CONTRACT library comes with an improved `contract-stronger?'.
Its error messages note that the contract itself might be wrong.
* The GUI library is DPI-aware on Windows.
* The OPENSSL library supports Server Name Indication for servers.
Thanks to Jay Kominek.
* The SYNTAX/PARSE library allows the definition of new pattern
forms via pattern expanders, similar to match expanders.
Thanks to Alex Knauth.
* OpenGL on Linux no longer depends on libgtkgl, and core profiles
are supported (see `set-legacy?').
* The TEACHING LANGUAGES' unit test framework supports
`check-satisfied', a construct for checking whether a result
satisfies a predicate, e.g.: (check-satisfied (sort l) sorted?)