Regression - Flash is not working in IE9 and IE10

In console, set following property values - /hippo:configuration/hippo:workflows/gallery/image-gallery/frontend:renderer
– fileupload.flashEnabled = true
– fileupload.jsMultiSelectionsEnabled = false
Steps
1 - Login to CMS
2 - Navigate to Images, any folder and attempt upload image files
Expected - A dialog should open with a flash button where user should be able to select multiple files
Actual - Browse button is shown and only one file can be selected at a time

Note - This is working fine on IE8, FF & Chrome. This issue occurs only on IE9 & IE 10