Like the title says my 'horizon' seems to be off, so it appears that I'm always looking or moving uphill with whatever direction if facing...
If I crank the tracking camera so that's its pointing towards the ceiling I can temporarily correct this but the horizon always drifts back to being uphill...
This happened to me after i installed 0.8. When i put on the oculus demo my head was level with the desk. I had to play with the reset camera function and angling my camera to different angles and it seems to have fixed the issue. That was earlier today.
I would say just tinker with it and hopefully it will resolve itself.