Steps to reproduce: 
1. Start RadControls for WinForms Q1 2011 Demos 
2. Open RadGridView/Indicate Errors demo application
3. Stretch column Position dragging the right border of the column to right till the end of the screen
4. Stretch column City dragging the right border of the column to right till the end of the screen
5. Scroll on the right to column Phone
6. Scroll back to column Name
6. Point to field King, Robert
7. Incorrect error message "This is not a valid email!" appears