Not a question, a tip, because this took me ages to work out, and I'm sure this will help someone.

I copied our live site over a week ago to do some test runs on upgrading the site, and changed the compilation setting in the web.config from debug="false" to "true".

This resulted in macro errors appearing in the rendered page as follows:

<Macro: (,)>

I forgot I'd made the change, so it took me a morning to work out why this was happening.

Thanks,

Muiris