After the most recent upgrade offered for Contact Form 7, I'm getting a similar error. I am getting it on multiple sites where Contact Form 7 is being used. Every site is giving me the same error!
http://www.sapphiresolutionsltd.com/contact-us/
Fatal error: Call to undefined function imagetypes() in /../../../wp-content/plugins/contact-form-7/modules/captcha.php on line 201
http://www.fumc-ottumwa.org/contact-us/
Fatal error: Call to undefined function imagetypes() in /../../../wp-content/plugins/contact-form-7/modules/captcha.php on line 201
http://www.captivatingexposures.com/contact-me/
Fatal error: Call to undefined function imagetypes() in /../../../wp-content/plugins/contact-form-7/modules/captcha.php on line 201
http://www.mvfdonline.com/contact-us/
Fatal error: Call to undefined function imagetypes() in /../../../wp-content/plugins/contact-form-7/modules/captcha.php on line 201
Each web site is using WordPress 2.8.4 and has the following:
Apache version: 2.2.9
MySQL version: 5.0.51
PHP version: 5.2.6
This problem did not exist until the most recent update for Contact Form 7, or at least that is when we first noticed the issue on all sites!