User blog comment:Dopp/Technical Update: July 26, 2011/@comment-4993782-20110728183908/@comment-126761-20110728201524

It should have been fixed earlier today - please try refreshing the page and see if it continues. (If it is the same issue, it occured when the right rail is closed in source mode, and covers the right 2/3 of the edit area).

On adding pictures, what kind of issue are you specifically seeing? You can't open the dialog, or it doesn't insert the wikitext, or...?