Second-quarter profit nudged higher at Xilinx ( XLNX) as a stock-compensation charge offset a 19% revenue jump, but the company said its top line for the current quarter won't meet current estimates.The chipmaker also said late Tuesday that the latest quarter reflected a $1.5 million charge related to "minor differences" between approval documentation and certain recorded stock-option grants. The charge wasn't material to any particular quarter, Xilinx said, and it will not restate any financial results. The company announced last week that it would delay its earnings release to Tuesday, citing the incomplete status of an independent investigation of the company's stock-option practices. That review is still not complete, but Xilinx expects the investigation to conclude before it files its Form 10-Q for the first quarter of fiscal 2007. Xilinx said net income rose to $82.8 million, or 24 cents a share, including a stock-based compensation charge of $26.8 million. Such a charge was not reflected in the year-ago quarter, when the company reported earnings of $76.8 million, or 21 cents a share. A Thomson First Call survey of analysts was expecting Xilinx to report earnings of 26 cents a share, but it wasn't immediately clear if the estimate reflected the disclosed $1.5 million stock option-grant charge. Revenue of $481.8 million in the latest quarter missed First Call's estimate of $487.8 million. For the third quarter, Xilinx expects revenue to be sequentially flat to 5% lower, suggesting a range of $457.7 million to $481.8 million. First Call was expecting third-quarter revenue of $493.2 million. Shares of Xilinx were off $1.05, or 5.4%, in after-hours trading to $18.55 on Instinet.