When a Right-To-Left grid is printed the text of all print cells should be drawn with the StringFormatFlags.DirectionRightToLeft.

Example:
RadGridView with RightToLeft set to Yes
A decimal column with negative values
the values in the decimal column are drawn as 96-, 88- etc
if this grid is printed the values will be -96, -88

Workaround: http://www.telerik.com/community/forums/radprintdocument-from-a-grid-wrong-format-when-right-to-left-true-in-grid