I am having the same issue.
I have installed a fresh copy on my server to compare to the current version having issues.
The quick edit doesn’t work and displays the URL with a hash tag tacked on to the end of the URL.
Also, the content in the editor (post or pages) isnt visible. It displays as white text.
I also tested the site on another server and it works fine.
I am running 3.0.1 and tested it with 3.0… same issue.
Any suggestions would be helpful.
Thank you!