Hi Michael,
Thank you for contacting the Telerik's support team.
It would be very helpful if you could send me a sample page which reproduces the described issue as we have fixed a bug about
persisting the DataSource after a postback in the Q2 2013 SP1 release (this seems to be the same version of your RadControls)..Your assistance is highly appreciated and it would allow me to investigate the case and give you further suggestions.
Regards,
Stamo Gochev
Telerik
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