I was using DataSource.Read with additional parameters to get data from server to load grid. It was working fine with Q1. But after upgrading libraries to Q3 it is not working. It passes "null" parameter value to controller.
This was addressed in the latest service pack release (2013.3.1324), see this forum thread: http://www.telerik.com/forums/passing-addtional-parameters-to-remote-read-function-stopped-working For future issue or bug reports please use our support channels (forums or support system) on telerik.com/kendo-ui. Thank you for your understanding