willo_the_wisp

Hi,

Thanks for replying. I worked it out myself in the end, sorry but I should have updated it here.
The problem was that the ‘WooCommerce Product Add-ons’ plugin I was using was set to only allow alphabetic characters in the fields. That meant it wouldn’t allow users to insert a space, a hyphen, an apostrophe or any other non-alpha character.
I changed the setting and the problem is now resolved.

However this does mean that the user could potentially add “o’hara1234” in the field for example, so it’s not ideal.

I had this problem too, using WordPress 3.8.1. WordPress plugin directory says this plugin is only compatible up to 3.6.1.

However, I found my problem could also be solved by altering the folder permissions AND ownership. In my case, I had to delete the /uploads/wpcf7_captcha that had been automatically created, and re-create it manually using FTP. I then set the permissions to 0777 and it works fine now.
Hope this helps someone.