Error "sortedData is not a function" (with repro)

Hi, this is probably my fault, but when trying to use it with server-side paging, I get an error from kogrid (line 1473 of the debug version). Probably it's just me using the library in an unintended way, anyway this might eventually be a hint for you for a more "defensive" coding. I posted a full question with a fiddle and an attachment (to be used as an alternative to the fiddle) here:

https://groups.google.com/d/topic/knockoutjs/ikE1TltWeSg/discussion

Could anyone tell me what's wrong in my code? As it is now, it should resemble a typical skeleton for server-side paging and filtering, so I think it might be useful for other noobs like me. Thanks!

Start at line 1473 of the debug version of kogrid and reproduce the failure using the linked Google Groups discussion, fiddle, and attachment. Trace why sortedData is not callable when server-side paging and filtering are used; done means the reported reproduction no longer raises the error or the intended usage is clearly established.

Written by the indexing model from the issue text.