Site on Ext Core

[Mycoding]

http://moc-081.ru/

There are some bugs.
I test it only in FF 4 and Chrome.
In IE some bugs which I can't understand how to fix.

I very need comments and advice.

Here is video on case something works bad.

http://www.youtube.com/watch?v=LaDoq9oMBKU

[Mycoding]

Please write any comments.:)
I very need opionion of Sencha comunity.