zsh-3.1.2-beta menu completion strange behavior

[yamagata@xxxxxxxxxxxx]

Hello,

Nowadays I am testing zsh-3.1.2-beta
it's completion is differ from zsh-3.1.1,

Without no zshrc, zshenv, doing

	nwgpc% mkdir aa
	nwgpc% mkdir aa/bb
	nwgpc% touch aa/bb/cc
	nwgpc% touch aa/bb/cc.0
	nwgpc% touch aa/bb/cc.1

and, type

	nwgpc% ls a[TAB]

then I got

	nwgpc% ls aa/

then hit TAB key twice more, I got

	nwgpc% ls aa/bb/cc
                          ^cursor is here.

After I hit Return key, last "c" character is removed and,

	nwgpc% ls aa/bb/c 
	ls: aa/bb/c: No such file or directory

When I used zsh-3.1.1, it successfully execute "ls aa/bb/cc".

Why? What should I do?

			yamagata