I was fooling around with adding a blog and during setup selected visible only to user I specify, and chose my own account. On reload I get only a white screen (any site page, from any browser, Mac).
I discovered that if I delete history and cookies I can reload the site and browse as a guest, but as soon as I log in ... white screen.
I deleted the (suspected cursed) blog but still cannot log in. I tried logging in using a different account (an admin account, then a test user account, both from the ACP and from history-deleted other browsers) and always white screen. Browsers are giving me 500 errors so it feels like I blocked myself somehow ...