iTerm and Zsh

Hey all, i'd like to use iTerm with zsh alltought my zsh setup works well with Terminal.app, iTerm.app complains about my PS1 definition and the way i've writen some aliases : -sh: alias: -g: invalid option alias: usage blahblah with Terminal.app i don't have a .zshrc, all my zsh setup is under $ZDOTDIR ZDOTDIR = HOME/Library/init/zsh and even doing symlinks to all of my .z* under ZDOTDIR don't work. something strange to me is that it's sh reporting errors... best, Yvon