Hi Ben,

Indeed, this is a issue on our side, thanks for reporting it. The Grid column headers now render a CSS class, which is related to filtering and increases the right cell padding. However, the checkbox header cell does not need this class.

You have three options for an immediate workaround, while we fix it:

• increase the checkbox column width
• decrease the right padding of the checkbox column header
  

  .k-grid-header th.k-filterable:first-child {
    padding-right: 12px;
  }

• disable the overflow ellipsis in the checkbox column header
  

  .k-grid-header th.k-filterable:first-child {
    text-overflow: unset;
  }

Note that the CSS workarounds rely on the first column to be a checkbox column. If you use different Grids in different scenarios, you can use a custom CSS class to target the workaround to specific Grids only.

.MyGridClass .k-grid-header th.k-filterable:first-child {
  /* ... */
}

Regards,
Dimo
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