Running Drupal 4.7... I have not changed anything anywhere in the settings (at least, not consciously). This morning, when I logged into my site, the main content was displaying as always... the most recent post was at the top, followed by the next most recent, etc.
This afternoon, when I logged in, I noticed some "new" topics at the top of my river of news... except after a few seconds I realized that they were not new... they were old -- the oldest ones in fact. My "river of news" on the main content page is now reversed, with the oldest one listed at the top, and the newest on the "last page".
Oddly enough if I log out, then everything displays correctly.
My one guess is maybe this has something to do with OG (organic groups) -- since when not logged in, I am not in any groups, but when logged in, I am. However, OG is set to display group posts (when looking at the group's page) as a "river of news" and (when on the group page) is still doing this in the proper (reverse chronological) order. So I have no idea what is going on really.
The bizzare thing is I have not changed anything at all on my site... I have not updated drupal or OG or any module. In fact I was away most of this past week so I didn't even log into it -- and no one else has admin access, and as far as I can tell nobody has tinkered with it (the site doesn't appear to have been hacked).
Any suggestions/ideas?