Under OS X Yosemite I get some odd behavior with the menus. My view menu
has missing items, and the windows menu does nothing at all.  See picture
below:

​

On Tue, Nov 24, 2015 at 6:34 AM, Ryan Culpepper <ry...@ccs.neu.edu> wrote:

> Racket version 6.3 is now available from
>
>     http://racket-lang.org/
>
> - Racket's macro expander uses a new representation of binding called
>   "set of scopes". The new binding model provides a simpler
>   explanation of how macros preserve binding, especially across module
>   boundaries and in hygiene-bending expansions. The new expander is
>   mostly compatible with existing Racket macros, but there are some
>   incompatibilities. For the formally inclined, a research paper on
>   this macro system will appear at POPL next year:
>
>       http://www.cs.utah.edu/plt/scope-sets/
>
> - Racket's GUI library now uses Gtk+ 3 when available, instead of Gtk+
>   2. Set the `PLT_GTK2` environment variable to select Gtk+ 2.
>
> - Added a new Redex tutorial based on a week-long workshop in SLC.
>
> - Better syntax error checking for Redex patterns that do not use
>   holes correctly.
>
> - The blueboxes are more agressive about finding names to look up in
>   the docs, meaning they are useful much more often.
>
> - Submodules are now fully supported in Typed Racket. Previously, some
>   uses of submodules would produce internal errors, making it hard to
>   `module+ test` and `module+ main` effectively in Typed Racket. The
>   switch to the set-of-scopes expander fixed these problems, and
>   submodules are now happily at home in Typed Racket.
>
> - The `typed/racket/unsafe` library provides import and export forms
>   that circumvent contract generation. This improves performance for
>   typed-untyped interaction at the cost of safety and debuggability.
>
> - Typed Racket provides experimental support for units (from
>   `racket/unit`).
>
> - The experimental `define-new-subtype` form allows overlaying finer
>   distinctions between otherwise identical types, similar to Haskell's
>   `newtype`.
>
> - The `Promise` type constructor changes in a backwards-incompatible
>   way to exclude promises created with `promise/name`.
>
> - The `unstable-*` packages are out of the main distribution. Most of
>   their contents have been either merged with established Racket
>   libraries or spun off as their own packages. This change is
>   backwards compatible for packages that properly list their
>   dependencies. Full details:
>   http://blog.racket-lang.org/2015/10/retiring-unstable.html
>
> - edu: `big-bang` supports a display-mode clause so that world
>   programs can take over the entire screen.
>
> Feedback welcome
>
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