I had two of them today. Both while posting pictures in reply to a thread. One thread was about a fire truck being conveted to a dump truck. I got the error but back clicked and saw that I'd typed was still there. I added the picture to it again, and posted it. I got a reply that I had already posted and that I had to wait until posting again. I looked, and it was there. The weird thing is that when I'm in the 24 hours list of new posts, it doesn't show up that I posted to that thread.
Then just now I updated my thread on Creating a Lake in the Projects forum. I typed something and added two pictures. I got the error messge just like on the other thread. I back clicked and my post came up again, but without pictures. I added the pictures and posted it again.
I then went to the thread and can see that I just added to the thread, but when I click on it, nothing is there.
To make it even stranger, I can still edit my last post to that thread that I posted in October.
Eddie