Changes And Backward Compatibility Overview
RadFormDecorator for ASP.NET AJAX
A complete list of all changes can be found on Release History page: https://www.telerik.com/products/aspnet-ajax/whats-new/release-history.aspx
Telerik RadFormDecorator for ASP.NET AJAX Q2 2010
Breaking Change: Before Q2 2010, RadFormDecorator will style checkboxes and radiobuttons even if they have a class property assigned. From Q2 2010 this behavior is changed - RadFormDecorator will style them only if they don't have a class property assigned.
Telerik RadFormDecorator for ASP.NET AJAX Q1 2010
Buttons' height is increased to 22px. in order to fit and look better when placed next to RadInput or RadComboBox items. The previous button height was 21px. If you are using a custom skin, based on previous version, you should change your main skin's CSS as shown in this sticky forum thread.
Telerik RadFormDecorator for ASP.NET AJAX Q3 2009
RadFormDecorator for ASP.NET AJAX which is part of the Q3 2009 release is fully backwards compatible with its previous version (Q2 2009).
Telerik RadFormDecorator for ASP.NET AJAX Q3 2009
RadFormDecorator for ASP.NET AJAX which is part of the Q3 2009 release is fully backwards compatible with its previous version (Q2 2009).
Telerik RadFormDecorator for ASP.NET AJAX Q2 2009
RadFormDecorator for ASP.NET AJAX which is part of the Q2 2009 release is fully backwards compatible with its previous version (Q1 2009).
Telerik RadFormDecorator for ASP.NET AJAX Q1 2009
Total redesign of the skins, which aims for a uniformity of the appearance of all controls in the suite in the cases they are used to build RIAs
Refactoring of the CSS code to achieve better understanding, easier maintenance and handle problems with global styles
Changes to the CSS classes, so now all controls for ASP.NET AJAX comply with a common naming convention
Telerik RadFormDecorator for ASP.NET AJAX Q3 2008
RadFormDecorator is fully compatible with all previous versions of the control.