We were at 5.6.1.2 and then upgraded to 5.6.3.2 to fix security flaws. It didn't go terribly smoothly, but I was able to get it working (do_quote() was treating 1 as boolean type and requiring it to be numeric, ended up modifying the script to test for numbers and then setting the type to integer if true).

On completing the upgrade, I was able to access the dashboard, make changes, etc. as long as I didn't log out. Once I log out, I am unable to log back in. Newly registered users are also unable to log in.

If I roll the site and database back to 5.6.1.2, I'm able to log in again. If I only roll the site portion back, it won't let me in.

I'm not sure what was changed, but was wondering if anyone here could point me in the right direction.

Thanks.