BBcode [code] tags not working

[Ransack]

It is just the "code" tag. It is not the "img" tag or any other bbcode tag I am having problems with. It happens to both admins and regular users.

I have attached an example of a description of a template edit, which renders correctly on other boards but not on mine.

See codetag1.png composing the message.
See codetag2.png for the result. As you can see, the first code tag works, but that is a fairly simple bit of code. The second one does not. The "if" tag is not present. And the "a" (anchor) tag is interpreted and rendered as a link. That big long blank line (wherever that comes from, presumably the spaces I have indented in the code before "$post[...]" ) is one big link.

Thanks for any help.