Only can have one pop up window at a time

Not sure how to describe this :-), but when on the uploads page, previously you could have say the Title and Description box open at the same time. Even from multiple clips, almost layered, and it would allow you to copy and paste between various boxes.

Now you can only open one, which makes it lots of fun when trying to move things around using that page.

Same here

Open two separate window pages and log in to both.

You must not use this page to work from :-). That isn't a simple fix.