thanks! this solved everything.
same here…
downgrading is a possibility, but i’d rather see this fixed.
Ok, I managed to fix it for the time being:
Through the dashboard I was able to access the edit window for my latest post, and I could change the post ID in the address bar to go to the edit screen of the offending post.
I deleted it, and now my blog works again.
Still, I’d really like to know what just happened here, and how I can avoid it.