extjs4.1.1:The Tooltip is having an issue with chrome browser

[chandran09]

I have a tooltip create function which shows an image and it's filename in it's tip content.The tooltip create function is as follows,

this.imageTip = Ext.create('Ext.tip.ToolTip', {
target : this.el,
maxWidth : 400,
html : '<img src="http://localhost/images/img1.jpg?dc=1355817306373"/><br/><b>File Name</b>: img1.jpg',
listeners : {
beforeshow : function(component, options) {
component.update('<img src="http://localhost/images/img1.jpg?dc=1355817306373"/><br/><b>File Name</b>: img1.jpg');
},
scope : this
}
});
The Tooltip is having an issue with chrome browser.Sometimes it shows an emptybox,Sometimes it returns a partial view of the image and in other cases it works perfectly fine.The issue exists only in chrome browser.Someone please help me to fix this issue in chrome

[friend]

A Tooltip does simple, dynamic sizing based on its HTML content; however, images are an unknown quantity and you're aren't specifically declaring any sizing in your <img> tags either.

As a test, try declaring a fixed size for your Tooltips and see if the sizing behavior is normalized across browsers.