Unexpected "<" ?

a shared host. but it's my own account, and no one else has access.

The error logs have been blowing up lately, so this looks like some kind of issue from outside.
But I wouldn't know, many of the errors are simple people trying to log in and can't because of the 'unexpected ">" message

very strange.

yeah, awesome.

Thanks.

But the question is:
How to determine where the hack came in?

I ran the user management plugin, and removed all the users who have never posted and are unverified.
I changed my login and password att he server level
I removed the calender mod, and the link mod.
So now the only other addition to my board is the chatbox, the ajax version.

I am considering turning off guest access and new logins until I've gotten to the bottom of this, but at this point I'm not sure if it will do any good.

I suppose I could post my error logs so that people here could take a look, and possibly defend others from this type of attack, but they're huge and I don't want to do that unless it's going to be helpful.

I mean the root php documents for punbb

not the templates. not the style.

the actual documents themselves.

Are your files chmodded such that someone else could edit them?

I also have a site hosted at CWI which was modifed with the exact same code, July 23rd.

It looked like who ever hacked the site used a script which searched through the site of files with index or login in the name.  And then searched for </body> in the text and inserted the above code just above the end body.

I reported the issue to CWI and they told me that there had been a login from a server in Hong Kong.

Unless you figure out how the person got in, I would assume it wasn't a PunBB issue: as alano said, it was probably done by a script looking for vulnerable files. Make sure your files aren't writable by the webserver's user.