Links don’t show up on Menu

I have been using your wonderful plugin for quite some time now. However, since day one, links never ever show up on the menus anywhere. They still appear on the page ordering screen however.

Theme: Twenty Thirteen

Plugins:
404 to 301
ai code highlighter
akismet
asgaros forum
bbspoiler
bu navigation
bwp recaptcha
crayon syntax highlighter
easy columns
easycode
eazy xmlrpc pingback disable
editorial calendar
filebrowser
header footer
https redirection
insert php code snippet
jetpack
page list
quick drafts access
redirect
remove widget titles
repeating post
schedule posts calendar
scroll back to top
search and replace
simple calendar picker
simple no comments
simplest adsense ads manager
slideshow jquery image gallery
speech to text
speedron speed test
stop user enumeration
strictly autotags
term management tools
tinymce advanced
ttv easy embed
wp full auto tags manager
wp scraper
xml sitemap feed
youtube embed plus
youtube playlist thumbs