Over the past month or so, many users have stated they have not been able to post. In the forum and in the PMs. Some in the Shout Box. Some have resorted to trying to make a new user, and it didn't work. I will try to give you some of the reasons, and a few ways to possibly help.
First and foremost, like any software, upgrade the version. It is ironic, because our php version is too high. Rolling back would fix it. But, rolling back is never a good idea. Our UBB version is too low. We are 7.5.7, when we need to be 7.5.8. It was buggy at first, but is now rock solid. I will likely work on this over the next week.
Some of the things that can cause it are the following:
1. Copying and pasting into a post. Word and Emails are notorious. Texts are better. Many times, there is no issue. When you find cutting and pasting not working, then typing it directly in usually works. I typed a six paragraph email in the other day and was scared to death when I hit submit.
2. Long posts. This goes right along with the copying and pasting, because why do we copy and paste.
3. Some people just have a more difficult time than others.
4. Waiting a period of time.
5. Posting a small part of your post, then posting the rest after or contuing in that fashion.
Just some thoughts.