Erm...nothing?
No changes here.
Just wait. Mine was fine this morning. Bastards keep messing with shit for no reason :@
Is this the Inbox/Promotions/Updates thing from about months ago, or something new?
Yes, that. Really, months ago? *is.current*
I only ever use gmail to test spam. Want some?
I may have got it early by signing up to get it as soon as possible rather than just waiting for it to filter out, but it was definitely a while ago. It's OK once you get into it, filters out what you're most interested in for the main inbox and stuff you don't really need to see til you feel like it is tucked away elsewhere. So now for eg my phone doesn't bother alerting me that Evans Cycles have sent their weekly offers email.
It's split all my important stuff across three tabs, seemingly on a whim.
you can teach it a bit, I think. just drag a few from one to another.