I think it was an issue with only officers being able to use Alliance chat. It ended up restricting any non officer in an alliance from using any of the chat channels, or that was the impression I got from the screenshots people took of the problem.
This alliance channel is suppose to be for leaders and officers only..don't expect all members of 10 allied guilds to talk same time in same channel..this will be worse than ppl spamming WTS/WTB in droknar.