I'm getting frequent errors when attempting to post replies to an existing thread.

I get an "Internal System Error" and then when I try to moving my browser back and hit submit again I get a message that I can only submit one post every 60 seconds even though the first attempt fails.

I just tried to submit a reply to a long thread and it took 5 tries.

 

I've had similar experiences with internal errors - looks like some sort of timeout - I've seen it often - most times the post does take, but not always???