After updating to 2.8 I'm having a problem with the upload/insert buttons on post pages.
When I click the upload/insert buttons nothing happens. I don't get the normal popup window, but I also don't get an error.
This only happens on the edit/new post page. I've noticed I can upload through the upload/insert buttons on the Quickpress widget on the Dashboard.
Probably a related issue, on the edit/new post page, the left hand navigation also malfunctions. When I click the little dropdown arrow that would normally expand a the section under settings or plugins nothing happens.
I've tried going to tools->upgrade and running the automatic re-install a couple times. It hasn't made any difference.