I did not know of these release notes until after I had posted in another part of the forum so rather than rewrite my post from another forum I will quote it here:
The title of my post explains the problem - I'm in Victoria, BC. The search filter thinks I'm in Fort MacMurray, Alberta.
"Yes, my home location is set in Victoria and has never been changed from its original value. I am trying to create a list of all caches that have more than 90 favourites that are located in Canada. I had previously successfully created a list with more than 100 faves but thought I would future proof it a bit. That's when the trouble started.
Now, not only is the search center located as the title describes but the list contains no virtual caches at all. I know that to be completely incorrect. After many attempts to change my location I am here hoping someone will have an idea of what is happening."
After reading the whole of this thread it appears that gsbarnes and I aren't the only ones reporting an arbitrary search center and as I mentioned above the search is completely ignoring virtuals.