When you open the insert Table dialog window in the RadEditor using the Silk skin the layout is messed up.  Button text is wrapping and the text 'px' is wrapped under the input field.

You can see this happening in the following demo page.

https://demos.telerik.com/aspnet-ajax/controls/examples/integration/ribbonbarandeditor/defaultcs.aspx?product=editor

I have also attached a snip showing this.