Microsoft JScript runtime error: 'style' is null or not an object v2.65

Hi,

Dont know why this is suddenly happening, just switched computer on and started adding categories and i am now receiving this Microsoft runtime error when the store loads from a F5:

Microsoft JScript runtime error: 'style' is null or not an object

in file:

all.js#xfbml=1

Error messege (throw 1):

__d("ObservableMixin",[],function(a,b,c,d,e,f){function g(){this.__observableEvents={};}g.prototype={inform:function(h){var i=Array.prototype.slice.call(arguments,1),j=Array.prototype.slice.call(this.getSubscribers(h));for(var k=0;k<j.length;k++){if(j[k]===null)continue;try{j[k].apply(this,i);}catch(l){setTimeout(function(){throw l;},0);}}return this;},getSubscribers:function(h){return this.__observableEvents[h]||(this.__observableEvents[h]=[]);},clearSubscribers:function(h){if(h)this.__observableEvents[h]=[];return this;},clearAllSubscribers:function(){this.__observableEvents={};return this;},subscribe:function(h,i){var j=this.getSubscribers(h);j.push(i);return this;},unsubscribe:function(h,i){var j=this.getSubscribers(h);for(var k=0;k<j.length;k++)if(j[k]===i){j.splice(k,1);break;}return this;},monitor:function(h,i){if(!i()){var j=ES5(function(k){if(i.apply(i,arguments))this.unsubscribe(h,j);},'bind',true,this);this.subscribe(h,j);}return this;}};e.exports=g;});





Regards