your onlinde demo for batch editing found at:
http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/batch-editing/defaultvb.aspx?skin=Bootstrap
appears to be quite messed up with regards to the CheckboxColumn. Sometimes clicking on the column selects the box. Sometimes it doesn't. Sometimes double clicking does. Other times it appears impossible to get the box to become selected.
This is true regardless of the EditMode.Click or EditMode... something else.
I have also seen the same problem in Firefox and Chrome.