ESC t not ready for Chinese

[Dan Jacobson]

If I put the cursor between the last two items,
$ search 鼓山   福州
and type ESC t, I get
$ s   福州 鼓山earch
Whereas in real emacs, I correctly get
$ search 福州   鼓山
P.S., Here are the items again in case this mail gets mangled
$ echo search 鼓山   福州|qp-encode
search =B9=AA=A4s =BA=D6=A6{
$ set
BASH_VERSION='3.00.16(1)-release'
HISTIGNORE='&:bg:fg'
LANG=zh_TW.Big5
LC_COLLATE=C
LC_CTYPE=zh_TW.Big5
LC_MESSAGES=C
SHELLOPTS=braceexpand:emacs:hashall:ignoreeof:interactive-comments:monitor:noclobber:notify
TERM=rxvt