Mashable takes Facebook to task for some of its mistakes in 2012. Granted, we all made mistakes in 2012 … remember (that embarrassing event) and/or (person I dated)? 

But regarding Facebook, the "hidden inbox" was the really frustrating one. Looked like I’d missed messages from people and they probably think I’m a jerk for not responding, when the fact is I’m a nice guy — and I’ll be the first to tell you that. Mashable relays:

3. Instagram vs. Twitter and the Rising Garden Walls
In a move that has gone largely unexplained, Instagram disabled support for Twitter cards in early December. Instagram links no longer propagate as photos in Twitter streams, and users who’ve married the two in their social media lives are frustrated.

It’s clear Facebook still views Twitter as an existential threat, and perhaps rightfully so. The two networks keep adopting each other’s features (Twitter incorporating media, Facebook becoming a real-time news feed). But killing Instagram’s Twitter integration is a classic "walled garden" move by Facebook, and a sign that if you still want to use Instagram, you’ll have to play by Facebook’s rules.

Who loses in this battle of APIs? Users, according to Mashable’s deputy editor Chris Taylor. I have to agree.

4. Facebook Messaging Gets Weird
We’ve had email since the ’70s. It’s not that hard to implement.

Yet baffling quirks in Facebook’s messaging system came to light in 2012.

The first was a "hidden inbox" that stored messages Facebook deemed unimportant. Users in late 2011 and early 2012 were surprised to find outdated communications from friends and family buried there. While this "Other" inbox was not a new feature, it became black mark on Facebook’s user experience in 2012.

Remember kids: Users, not algorithms, should determine what is and isn’t important.

Another bizarre feature that bubbled up this summer was "Message Seen" notifications — essentially, a read receipt that indicates when users see your messages, chats and group posts. You can no longer hide from unwanted Facebook communications. Your friend will know as soon as you’ve read (and ignored) that request to attend her poetry slam next Thursday.

Oh, and you can’t turn it off (not without some fancy browser extensions, anyway).

If that’s not enough, Facebook just rolled out a dandy new feature that lets strangers send you a message for $1. Get ready for spam, unsolicited pitches and long-lost stalkers.