Autodesk (ADSK) - Get Report was down 14.3% in midmorning. After the close Thursday, the make of computer-aided design software posted first-quarter earnings of 50 cents per share, ahead of the Thomson Financial/First Call estimate of 46 cents and the year-ago 41 cents.

But Autodesk warned that it expects EPS of 40 to 50 cents on sales of $240 to $250 million. Analysts are expecting earnings of 56 cents per share on revenue of $226.3 million.