Thank you for reporting this.
In Q1 the dialogs were redesigned in a new way so now they can be set outside of the Dll which makes it very easy to extend and modify them. To allow this, the way the dialogs are rendered had to be thoroughly revised.
We did our best to ensure that everything works in the same way as in the original dialogs, but it seems we misplaced the localization of Width and Height in the dialog - sorry about that. This will be fixed for the first service pack of the Q1 release.
the Telerik team