This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190017 
Please use the new item for commenting, voting and subscribing instead of this one.

There is an open source library (http://bitmiracle.com/libtiff) that can be used to convert the TIFF images to different formats and then visualize the resultant file with an appropriate control (e.g. convert the TIFF to PDF document and import it in RadPdfViewer).

The fix will be available in next official release Q3 2014

This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190016 
Please use the new item for commenting, voting and subscribing instead of this one.

This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190015 
Please use the new item for commenting, voting and subscribing instead of this one.

The fix will be available in the next official release Q3 2014.

This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190013 
Please use the new item for commenting, voting and subscribing instead of this one.

Please provide XMLFormatProvider with RadSpreadProcessing so that we can import xml and export excel and vice a versa. This would be needed in UI fro win forms and asp .net as well.

This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190010 
Please use the new item for commenting, voting and subscribing instead of this one.

This problem is resolved with lib version 2014.2.721.