Hey, so I have the need for captcha, and figured I'd take a look at 
cfcaptcha instead of rolling my own, and at least on OpenBD Desktop (2.0.2, 
3.0 and 3.1) the CFCaptchaEngine returns blank with a few empty lines.

Granted, I may have missed something since the docs are empty for this 
command, but it's not throwing any errors.

Here's the code I'm testing: <cfcaptcha width="400" height="100" 
displaystring="bob">

Just shows a broken image, and when checking source and clicking the file 
it's just empty.

Anyone know what's going on?

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