Juniper's ( JNPR) problems got uglier Wednesday.The Sunnyvale, Calif., networking gear maker matched Wall Street's second-quarter revenue forecast but didn't report any profit data, citing an ongoing review of its stock option accounting. Juniper said its board believes so-called option backdating may have taken place, resulting in possible charges to earnings. Juniper also said it expects to take a $1.3 billion writedown on the value of past acquisitions and set plans for a $1 billion stock buyback. Juniper said second-quarter revenue rose 15% from a year ago to $567.5 million, in line with the Thomson Financial target. "We're pleased with the results for the quarter, the confidence our customers continue to place in Juniper and the strength of the business," said CEO Scott Kriens. "We see continued and expanding opportunity in the marketplace as we participate in the accelerating convergence on IP and benefit from the resulting demand for the unique capabilities of Juniper." But the company said it wouldn't provide further data on the quarter till its board completes a review of stock option practices and bookkeeping. "Although the investigation is not complete, and the committee is continuing its review of the matters, the committee has reached a preliminary conclusion that the actual measurement dates for financial accounting purposes of certain stock option grants issued in the past differ from the recorded grant dates of such awards," Juniper said. Juniper said May 22 that the U.S. attorney for the Eastern District of New York started an investigation into its option grants. Juniper said Wednesday the board believes charges to earnings will be necessary but can't quantify them yet. The company said the internal probe will keep it from making a timely 10-Q filing for the second quarter ended June 30. Juniper also said it is evaluating the carrying value of certain long-lived assets, consisting primarily of $4.9 billion of goodwill tied to previous mergers. The company said it "expects to record reductions in the carrying value of goodwill and long-lived assets for the Service Layer Technologies segment of approximately $1.3 billion for the quarter ended June 30, 2006." Shares of Juniper, down 36% this year, fell 20 cents in regular trading Wednesday before rising 6 cents to $14.20.