Hi,
As an addendum to the posts on this subject, there is quite a serious bug regarding the conditional text on the Functions tab of the Fields dialogue.
The Help files state 'There is almost no limit to the length of the text that you can enter. You can paste a paragraph in this box.'
In reality, you cannot paste text that contains more than one full-stop (period), including decimal points. So text such as, 'Faster than 3.8 seconds.' or 'nobody@anywhere.co.uk', cannot be used.
I'll raise a bug report on it later
Regards
JohnS