IE8 - View - Text Size doesn't work

Hello,

I have added some component in a cfm page and for business reason the user should be able to modify the text size through the option in IE8. View--> Text Size --> Larger

The text created in HTML does change the text size correctly but the text generated through extjs (a text field label for example) does not change.

Is there an config to activate somewhere to make it work?

Thanks for any help.

Best regards

IE8 - View - Text Size doesn't work