I've recently stumbled into an error using the default version of CAPTCHA in Magento 1.9:
"Image CAPTCHA requires FT fonts support".
As far as my understanding goes, this means FreeType font support isn't enabled on the server. As this version of reCAPTCHA is old, I don't see any reason to resolve this issue, and have opted for this extension, which uses version 2 and I have no issues.
The problem is that, if a client enables the built-in CAPTCHA in
CUSTOMERS > Customer Configuration > CAPTCHA > Enable CAPTCHA on Frontend > Yes or
Advanced > Admin > CAPTCHA > Enabled CAPTCHA in Admin > Yes, any page this is enabled for will crash that specific page.
So whilst it is avoidable by not fiddling with settings, this is not desirable and will likely be confused with the proprietary extension.
What would be the best way to remove this from Magento?