samhuri.net/public/posts/2006/04/zsh-terminal-goodness-on-os-x.html.md

<a href="http://www.apple.com/">Apple</a> released the <a href="http://docs.info.apple.com/article.html?artnum=303411">OS X 10.4.6 update</a> which fixed a <strong>really</strong> annoying bug for me. Terminal (and <a href="http://iterm.sourceforge.net/">iTerm</a>) would fail to open a new window/tab when your shell is <a href="http://zsh.sourceforge.net/">zsh</a>. iTerm would just open then immediately close the window, while Terminal would display the message: <code>[Command completed]</code> in a now-useless window.

Rebooting twice to get the fix was reminiscent of <a href="http://www.microsoft.com/windows/default.mspx">Windows</a>, but well worth it.