I saw the same behavior on my site after updating WP Auto Affiliate Links to the latest version. I’m running WordPress 3.8.3. Other things were also affected:
* The Add Link button in the visual editor; instead of inserting the link, the page gets reloaded, losing all your work
* Items are missing from the visual editor toolbar after a draft is saved
* Any visibility toggles like publish date, visibility, publicize, etc don’t open
I confirmed that this plugin is the culprit by deactivating all recently-updated plugins and turning them back on until the issues were reproduced.