Yeah, I've had a few reports of it. I know why it's happening (timezone difference between the server and you), I just haven't come up with the solution yet. It's strange because I can change the timezone in my browser and the timestamps are accurately changed, so I'm not sure why it's happening for some and not others.
I heard it was happening here on steemit.com for a while too. I'd be curious to know what the fix here was.
Haven't noticed here on Steemit - the time has always been accurate here for me.
Someone in slack a few days ago told me that early on it was happening to them. Can't remember who at the moment :)
Ah, so I found somewhere where it shows 6 hours ago - the internal market.