[Rails] GBP/pound sign being converted to question mark

[Rich]

Hi everbody. I'm at my wit's end with a tiny bug in my Rails app. The UK 
pound symbol (£) is being converted to a question mark (?) somewhere 
when I save my models. Here's all the information I can think of.

* Constructing a model containing a £-sign and displaying its contents 
works fine.
* Saving a £-sign into the database on the mysql command line and 
retrieving it is fine.
* Constructing a model containing a £-sign and saving it to the database 
results in the '?' being saved to the database instead of the £-sign.
* Everything is working fine on my development system, but the problem 
occurs on the production server.
* Both servers are using MySQL.
* The £ symbol appears in all variants of ISO8859 but not in ASCII.
* The application in question is running at http://owl.me.uk/ and and 
example of such a model that should contain a £-sign is 
http://owl.me.uk/blog/141 .
* I have tried setting the charsets of the table in question to both 
latin1 and utf-8 to no avail.

Has anyone come across anything like this before? Does Rails try to 
guess the encoding of the DB and rewrite the contents of models before 
saving them? Can anyone suggest anywhere else I should be looking?

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