Chrome 18 issue
No examples in 2.0 pr3 work, neither does my code obviously.
I am on dev channel, and it just updated to 18 today.
Interestingly, I do see DOM generated, you just can't see anything. And if I take out all mentions of css, it does render but without any styles - so it looks like CSS problem.
Ouch, we'll take a look into it.
In the setLengthValue method of Ext.dom.Element you need to change the following:
this.dom.style[name] = value + ' !important';
this.dom.style.setProperty(name, value, '!important');
We will have this fixed in the next release.