If you're having issues in-game, please post here with your issue instead of making a separate post! Lets get everything in one place, instead of multiple threads. If you're having a problem that someone else posted, give it a "like". No need to post again. Please don't post "same" since it doesn't help and really clutters the thread. If you can, please submit your issue with logs on our bug forum!
Black screen- We have identified the cause of this issue, and we’re working towards releasing a hotfix as soon as possible. While there is no ETA at this time, we will update you with maintenance information as soon it’s available.
Social features- We are investigating reports of players not receiving in-game chat messages or notifications. As part of our on-going investigation, we are disabling in-game social features at this time. Direct Challenges are unaffected, however friends will not receive in-game notifications.
Did a pack or wildcard disappear? Please contact our support team and let them know! They'll be able to look into your account and see what happened.
On a Mac? Here are the known issues.