On the pages I was loading to test there were only html/text modules, the 'house menu' skin object (from houseofnuke.com) and (running in the background) the ifinity url rewriter (free version).

Module caching is default, i.e.,

• object kept in cache 1200 seconds -- under individual module settings
• module caching is in memory -- host settings
• 'heavy caching' is chosen -- host settings

I've almost got it set up on my dev server (a bit of a pain as it is heavily protected with SSL and so required me to set up certs) so hopefully I can find out the problem, if I can duplicate it.

I'll enquire.  Though it's a hosted (and shared) environment so I doubt ... well, anything's possible.  I'll check into it.

On related note, I'll link to this blog post by Shaun W in case anyone needs background in terminology/theory on the topic.

Also, I've been playing with the test environment at home and so far can't duplicate the recycling behaviour. Another reason to ask about the virus scan perhaps. Though I couldn't really ask them to turn that off could I? Unless they can isolate my potentially virus ridden website in some other fashion.  :)