On my part is simply was a memory issue and resolved completely once I allocated more memory. Talk to your web host if you are unsure about this or do not have permission to modify the correct files yourself.
I thought that the latest version of bbPress resolved the issues that cropped up with the WordPress 3.4 upgrade. However, some of the admin on our site are still getting the following out of memory error message when trying to add a new post to our site http://www.optionmillionaires.com
Fatal error: Out of memory (allocated 15466496) (tried to allocate 19456 bytes) in /home/optionmi/public_html/wp-content/plugins/bbpress/bbp-includes/bbp-user-template.php on line 558
At first I wasn’t even able to install bbPress, but our web host increased our memory limit to 64M, and I thought everything was fine. I was able to add the forum, several related bbPress plugins, and have been adding forums and topics today. However, I just got word from two of the admin that they received the above message when attempting to post. It eventually lets them, but there’s obviously something going on. Any ideas on a fix?