I vaguely recall some complex story about a rotten shower base - was
that the one?

Got a link to it?

No I don't think so. My shower is over the bath and always has been. I
complained about snails all over my bathroom and in the bath.

Ah - yes - that's the one:

http://groups.google.co.uk/group/uk....5f0c9c f844a5

http://tinyurl.com/23mw6eb