I broke something. For awhile, clicking on "save and publish" would take me to a blank page with a URL ending /EditForm.

I found a page on the forums suggesting deleting the contents (several .js files) in a "combined files" folder, so I did.

Now it's broken in a different way--clicking "save and publish" simply reloads the admin page with the same content.

Any idea what the solution is?

... update: it turns out it stemmed from this problem, and resetting page types in MySQL was the solution.