Tcl/Tk 8.5.17 发布了，改进记录：
* Fixed crash in Cocoa Tk after [$button destroy].
* Stop hangs in...
- some [read]s of limited size.
- [gets] from non-blocking binary channels.
* Fix: [gets] failure to honor non-blocking setting.
* Fix: failure of [chan copy] to handle blocked input channel.
* Fix: Cocoa: PNG transparency appearance.
* Fix: Cocoa: button and scroll display.
* Fix: manage effects of [text] elide changes.
* Enhancement: Cocoa: improved drawing performance.
* Corrected button click event handling to support browser plugin.
* Update: Support build and run on OS X Yosemite.
* Update: MSVC14 compile support
软件详情：http://www.tcl.tk/
下载地址：http://www.tcl.tk/software/tcltk/download.html
来自:开源中国社区
