Apparently, two additional days wasn’t adequate to fully test everything coming in with GU61.  Who could have guessed?  There are reports that gear is randomly re-attuning itself when you zone or log off.  There is also some strangeness going on with AAs.  Rothgar has posted this on the official forums:

We will be hotifixing this bug tomorrow.  The downside is that all of your items will become unattuned again and we will refund adornments applied to any equipped gear.

After this runs tomorrow, the items should remain unattuned until you decide to attune them again.

Tomorrow’s hotfix will also include a fix for the AA trees not resetting properly or resetting at incorrect times.

Smokejumper has also chimed in on the issue:

Tomorrow’s hotfix will reset *all* AAs as originally planned. If you reassign AA points today, they will be reset again tomorrow, so feel free to experiment with settings today. You’ll get to reassign them again tomorrow.

Tomorrow’s hotfix will also properly unattune *all* items, even the ones in your bank. So you’ll need to reattune and empty out your overflow again tomorrow.

So I wouldn’t bother going through all your toons and making sure everything is set just right since tomorrow you’ll be thinking it’s GROUNDHOG DAY!