We've had to alter the search functionality of the site owing to performance issues. The data we've amassed over the last couple of years is immense and the additional hardware investment we'd need to fork out to keep performance levels at the standards our users require simply isn't there at the moment.
It costs an arm and a leg to keep these forums running, so in a bid to balance costs and performance we've been forced to remove the Boolean search facility. We hope this will be a temporary measure.
Thanks for your understanding.
Guy (Online Ed).