I am developing a menu and found a problem when the panel is resized. When I was using the navigator chrome the problem didnt happen, but on IE 9 when I resize the panel the page loses the focus and I have to click in some place of the page to put the focus again. Just after. Just after this steps I can resize the panel again.

It didnt happen only with my menu. I was looking the examples here and all of them happen the same thing. For example this: http://docs.sencha.com/ext-js/4-0/#!...t-browser.html , try to resize the panel "Sample Layouts" more than once".