I had a message that Drupal 5 was no longer supported and to update to Drupal 5.1. I went to drupal.org to see how to back up and install manually as I was instructed, and I followed the instructions to the letter.
I've cleared the cache (3 times), ran Drush which tells me everything is up to date, then I get urgent update messages like this.
Basically, should I go and re-do the core upgrade when it's obviously already there, or is it safe to ignore? I'm totally new to Drupal, but can't find any way to get help directly from them.