No "raw" HTML plugin allows 'script' tags in multisite?

I’ve tried just about all of the plugins:

1. Raw HTML
2. ML Raw HTML
3. TrueEdit

None of them prevent the <script> tag from disappearing.

Take this example:

<script type="text/javascript">
  function foo(bar) {
     frobozz = 'a';
     bat = bar;
  }
  </script>

When I save it, it becomes:

function foo(bar) {
     frobozz = 'a';
     bat = bar;
  }

Is there something wrong with my site? I’m running WordPress 3.0.5 in multisite. Is it a multisite problem? Maybe I have to be the Network Admin, and not just an Administrator?

Or are all plugins broken?

http://ww.wp.xz.cn/extend/plugins/ml-raw-html/
http://ww.wp.xz.cn/extend/plugins/raw-html/
http://ww.wp.xz.cn/extend/plugins/trueedit/