I'm still experiencing this issue where my grid columns inside a tabstrip cannot be resized without setting scrollable to true. I am using the latest version of Kendo UI, v2015.1.429.
I've attached a kendo dojo export illustrating the problem. Please let me know if this was not fixed in the latest version as stated above or if I am doing something wrong.
As I see it I have two options for a workaround.
1. Enable scrolling but hide the vertical scrollbar. I'm not a fan of this because I don't want horizontal scrolling to be possible.
2. Manually intercept the tabstrip select event and show the grids myself. This would require some custom CSS to get the tabs aligned correctly but I think it should be pretty straight forward even though it defeats the purpose of using the framework.
Thanks!