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An inline dialog is created as a part of the existing page and window but styled to look as a pop up dialog. This means that the dialog is technically the same page as it’s “parent” window. In Internet Explorer 8 new windows are run under a separate thread. This can cause race conditions between script running in different windows. The EPiServer Development Team have spent time addressing bugs that are caused by race conditions when closing a dialog, specially if the dialog has made a post back before closing itself.
In the Tiny MCE implementation in EPiServer CMS 6 external dialogs are used when opening built in Tiny MCE dialogs (for instance the insert/edit image dialog). These dialogs works a bit differently than the rest of the dialogs in the EPiServer CMS UI. For instance, it’s possible to access the underlying UI when a dialog is opened. Please note that this behavior is not intentional.
To address the race condition problems in IE 8 (and new versions of IE and possible other browsers) as well as creating one user experience for editors when using dialogs we would like to rewrite EPi.Dialog to use inline dialogs. Since we are currently working on upgrading Tiny MCE to the latest version (3.3.4 at the moment) we would like to do these changes as the same time.
We are normally very restrictive with making breaking changes, but since we believe that very few will be affected by this change we would really like to address these issues. If you know that this will affect you, for instance if you are using EPi.Dialog in an EPiServer CMS module, then please reply to these post so that we can this into consideration before making a final decision.