WTF Steam .. Broke all my Library Classification !!

I also use the beta, but don't have this bug. Yes, I dont't have many categories but still they are there.
Happened once, though, but can't remember for what reason and i was quite mad when that happened.

Yes, this happens sometimes, nothing new at all. Be happy you can select multiple games at a time to put into categories now.

Also, I don't know much about it, but you may be able to back up your categories with Depressurizer.

It happened to me earlier today, I restarted the client and all came back as it was.

It happened to me multiple times, restarting steam fixes it.

panic, create a rant thread, panic more, restart steam.

works everytime.

The sort order is stored on your Steam Cloud. Usually when this happens it is because it didn't load from the cloud properly, which usually happens when some Steam servers are offline or there is some congesting between you and them. You should restart immediately if it happens because if you don't, your client might re-sync the new categories when it re-connects.

This used to happen quite often a while back. There was a trick that would make sure your categories synced. It may not be necessary anymore, but I still do it every now and then, especially after I re-arrange my categories. After you set your categories, manually put Steam into offline mode by clicking Steam and selecting "Go Offline..." Close Steam, then start it again, letting it go into offline mode. Then put it back to online mode by clicking Steam and selecting "Go Online..." The explanation behind this at the time was that putting Steam into offline mode forced a sync during shutdown. Normally Steam syncs on shutdown anyway, but if there is any delay, Steam would close without syncing instead of waiting. If you made changes and Steam failed to sync, you might lose those changes after a restart.

WTF... you broke my steamgifts ;(

Same here, restarting doesn´t fix it. Thanks a lot Steam, re-organzing 1200 games isn't fun.

Its happened to me a couple of times so far, just restarted steam and everything was working fine.

Same, spent hour + arranging it, couple days later, reset. never used that shit feature again. (Never used beta)

Same, happened to me like a day ago. Only broke the classifications of about 20 games though, and I don't own too many (yet) so it wasn't too annoying...