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Sorry i forgot to give you a log of the errors:

On Edit Post:
Uncaught TypeError: Cannot call method ‘toLowerCase’ of undefined
highlight_tagsheadspace-tags.js:76
$.headspaceheadspace-tags.js:15
$.fn.headspaceheadspace-tags.js:98
e.extend.eachload-scripts.php:2
e.fn.e.eachload-scripts.php:2
$.fn.headspaceheadspace-tags.js:97
$.extend.ajaxurlheadspace.js:25
f.Callbacks.oload-scripts.php:2
f.Callbacks.p.fireWithload-scripts.php:2
e.extend.readyload-scripts.php:2
c.addEventListener.B

On Edit Categories, Pages and on different plugins too:

Uncaught TypeError: Object [object Object] has no method ‘sortable’
(anonymous function)admin.php:215
f.Callbacks.oload-scripts.php:2
f.Callbacks.p.fireWithload-scripts.php:2
e.extend.readyload-scripts.php:2
c.addEventListener.Bload-scripts.php:2