Brewfest bugs continue to infest the live servers. Despite a rolling restart of all the realms this morning, the Barker quest is still bugged on many servers. Blizzard is aware and is currently trying to unravel the latest mystery glitch.
Blizzard was increasing the ticket reward for the Barker quest to make up for disabling the Dark Iron attack quest. If they can't get the Barker quest to work properly, they are going to have to think of another plan. There is only a limited amount of time to gather tickets for players who want the permanent rewards. CM Aeus on the European servers nixed the idea of the event getting extended.
Oceanic realms are also having Brewfest problems of their own. Because the servers are hosted in a different time zone, the Brewfest events didn't go live at midnight, but many hours later. Blizzard is aware of the time discrepancy problem and is looking into ways to avoid it in the future.
For players who intend to do the Barker quest when it is working, Blizzard has pointed out that /waving and /yelling are not necessary. You simply need to get close enough to the flags while on the Riding Ram. The quest updates using waypoint triggers, not emotes.
One bit of good news: the always excellent WoW Wiki has a page up on Brewfest listing quests, rewards, etc. This may help answer many questions players have such as, can I get the Ram quest before L40? (No.)