Version notes: Tcl 7.5 goes with Tk 4.1 This was the first cross-platform release. The final patch release was "7.5p1" Tcl 7.6 goes with Tk 4.2 This was a solid cross-platform release before the compiler. The final patch release was "7.6p2" Tcl/Tk 8.0 This featues the built-in bytecode compiler. The latest patch release is "8.0.5" Tcl/Tk 8.1 This featues internationalization and thread safety. Last patch release was 8.1.1, but even that was broken in some respects (e.g., server sockets on some NT service packs) Tcl/Tk 8.2 This is a bug fix/stabilization release in comparison to 8.1 New string subcommands (e.g., string map) appeared, too. Last patch release 8.2.3 Tcl/Tk 8.3 Features adoption of most of the Tk Dash and Img patches. Last patch release 8.3.5 Tcl/Tk 8.4 Features new widgets, more features and enhanced performance. This is the current stable release. Tcl/Tk 8.5 Currently in development, it will focus on revamping the default look of Tk and general improvements.