Funcky cell formatting

I'm using DataGridView.CellFormatting to change the cell fore/back colors depending on data values - for some cells only. However, the grid get's draw with all sorts of garbage (see screen shot athttp://jonesie.net.nz/PermaLink,guid,38d829b6-8610-44c1-9227-96f11d38b2e0.aspx).

My code is thus:

privatevoid RosterGrid_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { ShiftCell sc = e.Valueas ShiftCell; if (sc !=null && sc.RosteredShiftRow !=null) { if (!sc.RosteredShiftRow.ShiftRow.IsForegroundColorNull()) e.CellStyle.ForeColor = Color.FromArgb(sc.RosteredShiftRow.ShiftRow.ForegroundColor); if (!sc.RosteredShiftRow.ShiftRow.IsBackGroundColorNull()) e.CellStyle.BackColor = Color.FromArgb(sc.RosteredShiftRow.ShiftRow.BackGroundColor); e.Value = sc.ToString(); //e.FormattingApplied = true; // this makes no diff } }

What am I missing here?

[1645 byte] By [Jonesie] at [2007-12-16]