zsh: bad option, bash works

[Zind]

hi, all
Here is my execution result of the 'type -t' command:
% type -t poweroff
zsh: bad option: -t
% bash
$ type -t poweroff
file
$ zsh --version
zsh 4.3.11 (i686-pc-linux-gnu)

zsh warns 'bad option -t', but bash works fine
I test it on Ubuntu 11.10 & Fedora 15, but no change.
Any help or suggestion is appreciated.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.fedoraproject.org/pipermail/users/attachments/20111218/9269d0a8/attachment.html>