Hi!
In the last patch day Microsoft released KB2962872 (http://support.microsoft.com/kb/2962872).
It includes a security update for all Internet Explorer versions.
This morning one of our applications which depends on IE starts showing a strange behaviour. When opening modal dialogs in a cascade IE freezes and the application was not really useable. It tooks seconds to render or resize a modal dialog. After closing
a dialog the parent dialog was not reachable for seconds.
By deinstalling the patch, the problem was gone.
Our application has much code in it so we tried to reduce the code for reproduceable demo, which can be found here: http://www.setasign.com/files/ms/KB2962872/A.html
Just open the demo and click on the button "A", which opens a modal dialog with the same link. Click on the "A" button in the dialog to open an additional dialog... by opening 5-8 dialogs the behaviour should occur: Resizing is very
juddery and closing a window will freeze the application for some seconds. Without KB2962872 installed you can open nearly hundreds of windows without any problem.
We could reproduce this on IE9 (9.0.8112.16421 / 9.0.29) and IE11 (11.0.9600.17207 / 11.0.10) on Windows 7.
How can be report this bug to MS or is there a workaround but deinstalling the update?
Thanks!
Jan