RESOLVED: Some Safari and Opera users are experiencing difficulties saving or previewing posts and uploading images. We are aware of this problem and currently working on a fix.
Update, 9PM: Apologies to those affected. We have fixed the bugs that were affecting Safari and Opera. Autosave and photo uploading should now be working correctly.
We also took this opportunity to fix the bug that we think was the root of the mysteriously-disabled comments problem that some of you were experiencing.
Update, Sunday: We’ve been able to reproduce a second comment settings bug. Until this is fixed, if you notice the comments link disappearing from your posts, toggle open the “Post Options” at the bottom of the post editor and re-enable comments.
Update, later on Sunday: We’ve fixed the bug that was disabling comments on posts saved as drafts.