Microsoft breaks WPF printing with .NET update

Having some unexpected printer problems? Microsoft's August 2026 .NET update might have broken printing on your device. According to Microsoft, "After installing the August 2026 .NET Framework cumulative update, some WPF applications may fail with a System.IO.FileFormatException when printing or generating PDF/XPS content that uses certain fonts, including Calibri." Ah yes, Calibri, the default font in some versions of that little-used application, Microsoft Word. The cumulative update for .NET