It may be me, but the forum doesn't seem to work very well recently.
First of all, it's slow and sluggish -- loading a page takes several seconds.
Second, when loading a page, I often get an "Internal Server Error" response. This is particularly bad when posting: sometimes the post gets through despite the error message, sometimes it doesn't, sometimes it does but the post does not increase the thread's post count or more generally update the thread's last post info on the main page (even if I reload the main page).
As I said, it may be me, but I'm not experiencing these problems with any other websites...
ditto
Not just you. I get it on two different computers with two different versions of the same browser and on my phone as well.
Chris
I also posted the same issue in Ask Atlas.
seconded
The error is because it can not find the error page it wants so we are getting a 404 error which is not the REAL error.
Just sayin 
+1. It's getting slower every day... Has the database grown so big that there's no longer enough RAM to handle it without swapping?
I also have one further problem.
Occasionally threads get stuck as "unread". Despite my having read the entire thread (a few times, looking if there's a new post I've missed), some threads just get stuck marked "Unread".
It goes away if I press "Mark topics read", but it's still a bug.
The image of this thread being next to the "Rubbish" thread makes it look like everyone has complaints about Ars... hahahaha
Don't know why I took the time to post it, it was just funny.
Def a server lag or possibly a update that didn't take....
I found a way to view invisible posts. (For instance, I cannot see Ovarwa's post in House rule issues - wise counsel required!)
You just start to post a reply, and read them in the topic review at the bottom. Silly but it works. 
Possibly related: when you Google Atlas Games Forum,, two of the six results have the structure of an Atlas Games site (forum.atlas-gamnes.com and a forum number) but are actually trying to flog Xanax.