Problem using Firefox on this site

[Stanley]

For some reason Firefox will not let me post messages on here. All other browsers work fine.

I get this error message everytime I try to submit a post:

The following errors occurred with your submission: The message you have entered is too short. Please lengthen your message to at least 1 characters.

No other messageboards used on Firefox generate this problem. It seems Firefox does not recognise the text when I enter it in the message text field.

I've tried all the usual deleting cookies, history etc.

Any advice please? Sensible if possible

[Kirill]

I had this happen once, something to do with a peculiar character I inadvertently entered in the message body, I only wish I remember what it was :(

[Stanley]

I had this happen once, something to do with a peculiar character I inadvertently entered in the message body, I only wish I remember what it was :(

Thanks, but it seems to happen with all or any character.