

This happened where I work. An inexperienced team was making changes to a shared code base. They made changes to make usernames case insensitive, without thinking about them ready being case sensitive. So if you logged in with user CAT123, you might get cat123’s info. And then I was left on the team that had to clean up their mess and find and understand the impact.
I got the wireless 5450s. Had to replace the controller. Getting the replacements it was a guess between the sub and the controller. Which netted me backup of everything except the controller. Still works just fine and was used as primary surround sound until recently.