Category RSS feeds all show "all discussions"
I'm using 2.0.13, which I know is old, but needs to live a little longer until we have time to upgrade it.
Now, we are finding, since moving to PHP5.4 from PHP5.3, that RSS feeds are acting a little funny. Each RSS feed that we use, points to a different category. However, the feeds we get back are the contents of "all discussions".
I have narrowed it down to a session problem. If there is no session cookie, then "all discussions" are returned. If there is a session cookie, then the correct category is returned. This happens the same whether fetching an RSS feed or viewing the normal HTML page in a browser with cookies turned off. The point is, our RSS feed reader does not have session cookies, so it is always given the wrong feed.
Does anybody here recall coming across anything like this on an older version of Vanilla? If so, any memory of what was causing it?
In the meantime I'll keep digging, but I'm not having much luck so far.