Can you provide some more details? The more you can provide the more useful it may be.
PC, Phone, Tablet?
OS?
Browser?
RE pictures,...you cant see any at all, whether they are full size or attachments?
How old are the post you are trying to edit? There is a time limit now, so if they are older than a couple months, that may be the factor
You say others are experiencing it as well, perhaps we could get info from them as well.
I personally am not having any issues other than one I had last week.