Blue Coat ( BCSI) fell 6% Friday after the company became the latest to find that it may have backdated stock options.The Sunnyvale, Calif., Internet-security company withdrew its first-quarter financial outlook and said it expects to incur "significant legal and professional fees in this quarter" as it reviews stock-option practices. The disclosure comes as regulators and prosecutors take a close look at the accounting and disclosure ramifications of possible backdating at dozens of companies. "The independent committee has reached a preliminary conclusion that the actual measurement dates for financial accounting purposes of certain stock option grants issued in the past likely differ from the recorded grant dates of such awards," Blue Coat said. "Based on the preliminary conclusions of the independent committee, the Company believes it may record additional non-cash charges for stock-based compensation expense, but is not yet able to determine the amount of such charges or the resulting tax impact of these actions. The Company similarly is not yet able to determine whether any such compensation charges would be material and require the Company to restate previously issued financial statements." Shares fell $1.99 early Friday to $14.21.