I had an issue a couple of years ago with the toolbar not appearing for text boxes in Moodle - I resolved this by pressing the 'compatibility view' icon in the address bar.
Since updating IE to the newest version the issue has returned - but now there is no 'compatibility view' icon in the address bar. According to my web searches if the compatibility view icon is absent it is because the webpage is displaying correctly - but it isn't!
Any thoughts? I know I can switch to Firefox or Chrome but I like IE (and I don't like that Firefox and Chrome don't have a right click cut and paste function and instead require you to use quick keys).