On Wed, 14 Mar 2012 Leo Liu submitted an update to the zhspacing package. Summary description: Spacing for mixed CJK-English documents in XeTeX. License type: lppl Announcement text:

Bug fix for Plain TeX format. This is a bug fix update. The package is now supposed to be mainly for Plain TeX format, while xeCJK is a better alternative for XeLaTeX. The package is maintained on http://code.google.com/p/ctex-kit/

This package is located at http://mirror.ctan.org/macros/xetex/generic/zhspacing . More information is at http://www.ctan.org/pkg/zhspacing (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .

Thanks for the upload. For the CTAN Team Rainer Schöpf