We have several users using Google Syntax Highlighter for WordPress with out any issues.
When I attempt to add some code it does not work. The blog post will only show a large double quote before the code.
This is the syntax that I am adding
<pre name="code" class="sql">SELECT * FROM TestTable
After I publish or update the post the name and class of the pre disappear.
If one of my admins opens the post and publishes it, it works fine.
http://wordpress.org/extend/plugins/google-syntax-highlighter/