This reported problem is quite odd and we have not received such reports so far. Could you confirm whether you are using the latest build version of WebUI.NET
Framework 3 and WebGrid? The latest build version of WebUI.NET Framework 3 that comes with the Intersoft WebUI Studio 2011 R2 is 3.0.5000.800. I’d like to suggest you to install the Intersoft WebUI Studio 2011 R2 and apply the assembly of WebUI.NET Framework 3 and WebGrid to your project.

I tried to reproduce the reported problem on my local end by view the BatchUpdate_Enterprise.aspx sample file of WebGridSamples in browser and test the sorting, filtering, batch update feature but my efforts were not successful – everything worked smoothly and those features was accessed without any issues.

I’m willing to advise you further but in order to do so I would need you to elaborate on your specific scenario and possibly give me a step-by-step guide that I can use to observe the problematic behavior.