AutoCAD 2011 (and the whole Autodesk 2011 family) introduces a new alignment (orientation) type for texts in complex linetypes.
In the .LIN linetype definitions with texts or symbols, it has been possible to use the "R" code for relative rotation of the text against the orientation of the line segment, or the "A" code for absolute orientation. The usually used values were only 0 and 90°.
AutoCAD 2011 now offers also another alignment code "U". This code ensures an "always readable" text, i.e. the upright orientation in all directions of the line segments.
Compare the display mode of the standard AutoCAD linetype GAS with the code R and with the new code U:
You can use the utility CADstudio LTfly (see Download) for an automatic definition of a linetype with an embedded text. This tool automatically uses the U-code for AutoCAD 2011.