My site is dynamiclens. I have been running an older version and noticed that the site was a bit sluggish. I needed to update anyway, so I did. No problems. I'm now running 3.5.1 and my site runs smoothly. If you're a visitor.
But if you're an admin and want to do ANYTHING with the dashboard, it's slow as dirt. Posts, for example. I can view my list of posts and it takes it a few moments, but eventually loads them all (there's like eleven of them). But if I click on any of them to actually try and edit them, WordPress takes me to the edit page, but never actually loads anything into the edit window itself. It just gets stuck eternally loading it, and never actually shows anything.
Or editing a page. Same thing. When I choose to edit a page, WordPress gets stuck loading the page contents into the editor.
This is happens on Chrome and Firefox, from different IP addresses and physical locations. It happened before updating to 3.5.1, and it's still happening. It basically renders me unable to update my site.