On Thu, May 8, 2014 at 4:20 PM, Zachary Ware
I updated the 2.7 buildbot scripts to pull in Tcl/Tk 8.5.15 a couple of weeks ago (see http://bugs.python.org/issue21303), but hadn't gotten anything done with Tix yet. It should just need python.mak updated to point to Tcl/Tk 8.5.15; it's on my list to get fixed as soon as I can.
Tix for 2.7 is now http://svn.python.org/projects/external/tix-184.108.40.206. You can build it with this monster of a command, run from tix-220.127.116.11\win:
nmake -f python.mak DEBUG=0 MACHINE=IX86 COMPILERFLAGS=-DWINVER=0x0500 TCL_DIR=....\tcl-18.104.22.168 TK_DIR=....\tk-22.214.171.124 INSTALL_DIR=....\tcltk all
Use "install" instead of "all" after building to install it to ....\tcltk. Set DEBUG and MACHINE as needed; DEBUG does not need to be set if you're building Release, but MACHINE always has to be set so that Tix uses the right build dir for Tk (IX86 for 32-bit, AMD64 for 64-bit).