Updated from 2:24 p.m. EDT Shares of Intrado ( TRDO) were among the worst-performing technology stocks Thursday after the emergency-communications company said second- and third-quarter earnings and sales would be below expectations. Citing a one-quarter delay in license revenue and a writedown of capitalized software costs, Intrado is now expected to earn 1 cent to 3 cents a share, compared with previous guidance of 16 cents to 22 cents a share. Sales, meanwhile, are now expected to be between $32 million and $32.5 million, below previous expectations of $33.8 million to $35.1 million. Looking ahead, it now expects third-quarter earnings of 8 cents to 22 cents a share on sales of $32.5 million to $35.9 million. Analysts polled by Thomson First Call had expected second-quarter earnings of 18 cents a share on sales of $34.4 million and third-quarter earnings of 25 cents a share on sales of $37 million. Shares of Intrado traded down $3.96, or 26.7%, to $10.85. Planar Systems ( PLNR) rose after it posted stronger-than-expected third-quarter earnings and sales. Though its earnings fell 39% from a year ago, profit of 18 cents a share easily beat expectations of 13 cents a share. Sales of $66.7 million were stronger than the $64 million analysts had expected. Looking ahead, Planar expects earnings of 15 cents to 20 cents a share during the fourth quarter on sales of about $70 million. Analysts are looking for it to earn 19 cents a share on sales of about $73.5 million. Shares of Planar Systems traded up $2.03, or 16.8%, to $14.09.