Today I've installed contact form 7 plugin.
My wordpress is 3.5
C F 7 is version 3.3.2
Really Simple Captcha is 1.5
It happens a strange issue, in the captcha image, instead of four characters they appear only one or sometime two characters.
So the issue is NOT a not showing captcha image, instead looks to be a wrong generated captcha image.
I don't know Contact Form 7 plugin and so I don't know if this additional info means something, but I notice that if I refresh the page with the contact form, the captcha image changes twice when refreshing.
Refreshing many times may publish an image with the four characters, but it is totally a random matter.
What is wrong?