Hi,
We have a Windows Application using the Crystal Report Viewer (Win Forms, not WPF) and filling Reports via XSD Datasources from our Application.
On some of our Clients Reports we noticed a similar Problem as described here "Can Grow" Fields cutting Text on right Margin if Page Setup has no Printer and here Problem with "can grow" after conversion on Fields filled with RTF text. Having the error show up in the Viewer seems to depend on the Zoom setting - the error shows up when printing with no correlation if it happened in the Viewer or not.
I checked all older versions of CR2010 (13.0.1 - 13.0.8 ) and interestingly found that in SP1, the automatic Line Breaks happen earlier and so the Problem does not appear.
I have attached a simple Report I created to easily reproduce this behavior without a Data Source.
We can not change the report option from "no printer" as mentioned in the second link because printing takes a lot longer if Crystal cannot find this printer on the system.