EXPLANATORY NOTE

Restatement of Consolidated Financial Results

We recently completed a voluntary review of our historical stock option granting practices and a restatement of our consolidated financial statements as of and for the fiscal years ended March 31, 2006, 2005 and 2004 and related disclosures and a restatement of our selected consolidated financial data as of and for the fiscal years ended March 31, 2006, 2005, 2004, 2003 and 2002 and our unaudited quarterly financial data for each of the quarters in the fiscal years ended March 31, 2006 and 2005, and for the fiscal quarter ended June 30, 2006.  The impacts of the restatement adjustments extend to periods from the fiscal year ended March 31, 1994 through the fiscal quarter ended June 30, 2006.

The restatement reflected the findings of a special subcommittee of independent members of our Board of Directors, which was established in July 2006 to review our historical stock option granting practices (the “Special Subcommittee”).  The Special Subcommittee conducted its investigation with the assistance of Munger Tolles & Olson LLP as its independent counsel and Deloitte & Touche USA LLP (“Deloitte”) as forensic accounting experts retained by counsel.  The Special Subcommittee found that 3,450 of the option grants reviewed, covering 148,747,202 shares, required measurement date corrections.  As a result, we recorded approximately $66.7 million in additional pre-tax ($45.4 million after-tax) non-cash stock-based compensation expense over the thirteen year period from April 1, 1993 through March 31, 2006 in accordance with Accounting Principles Board Opinion No. 25, “Accounting for Stock Issued to Employees” (“APB No. 25”), and $0.6 million in additional pre-tax non-cash stock-based compensation expense during the quarter ended June 30, 2006 in accordance with Statement of Financial Accounting Standards (“SFAS”) No. 123(R), “Share-Based Payment”.  More than 80% or $55.4 million of the $66.7 million relates to periods through March 31, 2003 and 4% or $2.6 million of the non-cash pre-tax expense relates to the fiscal year ended March 31, 2006.  Separately, the restatement reflects an additional $1.7 million pre-tax charge ($1.1 million after-tax) related to recently identified insufficient payroll tax withholdings in fiscal 2005.

This Quarterly Report on Form 10-Q should be read in conjunction with our Amended Annual Report on Form 10-K/A for the year ended March 31, 2006 filed with the SEC on May 25, 2007 and our Amended Quarterly Report on Form 10-Q/A for the three months ended June 30, 2006 filed with the SEC on June 7, 2007. Information regarding the effect of the restatement on our financial position and results of operations is provided in Note 2 of the Notes to Unaudited Consolidated Financial Statements included in Part I, Item 1 of this Report and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part I, Item 2 of this Report.

Financial information included in our previously filed reports on Form 10-K and Form 10-Q, the related opinions of our independent registered public accounting firm, and all earnings press releases and similar communications issued by us, for all periods ended on or before June 30, 2006 should not be relied upon and are superseded in their entirety by the information in our amended Annual Report on Form 10-K/A for the year ended March 31, 2006 filed with the SEC on May 25, 2007 and our Amended Quarterly Report on Form 10-Q/A for the three months ended June 30, 2006 and our Quarterly Reports on Form 10-Q for the three months ended September 30, 2006 and the three months ended December 31, 2006 filed with the SEC today.

All share and per share information presented in this report has been adjusted to reflect splits and dividends of our common stock.

3

EXPLANATORY NOTE

Restatement of Consolidated Financial Results

We recently completed a voluntary review of our historical stock option granting practices and a restatement of our consolidated financial statements as of and for the fiscal years ended March 31, 2006, 2005 and 2004 and related disclosures and a restatement of our selected consolidated financial data as of and for the fiscal years ended March 31, 2006, 2005, 2004, 2003 and 2002 and our unaudited quarterly financial data for each of the quarters in the fiscal years ended March 31, 2006 and 2005.  The impacts of the restatement adjustments extend to periods from the fiscal year ended March 31, 1994 through the fiscal quarter ended June 30, 2006.

The restatement reflected the findings of a special subcommittee of independent members of our Board of Directors, which was established in July 2006 to review our historical stock option granting practices (the “Special Subcommittee”).  The Special Subcommittee conducted its investigation with the assistance of Munger Tolles & Olson LLP as its independent counsel and Deloitte & Touche USA LLP (“Deloitte”) as forensic accounting experts retained by counsel.  The Special Subcommittee found that 3,450 of the option grants reviewed, covering 148,747,202 shares, required measurement date corrections.  As a result, we recorded approximately $66.7 million in additional pre-tax ($45.4 million after-tax) non-cash stock-based compensation expense over the thirteen year period from April 1, 1993 through March 31, 2006 in accordance with Accounting Principles Board Opinion No. 25, “Accounting for Stock Issued to Employees” (“APB No. 25”), and $0.6 million in additional pre-tax non-cash stock-based compensation expense during the quarter ended June 30, 2006 in accordance with Statement of Financial Accounting Standards (“SFAS”) No. 123(R), “Share-Based Payment”.  More than 80% or $55.4 million of the $66.7 million relates to periods through March 31, 2003 and 4% or $2.6 million of the non-cash pre-tax expense relates to the year ended March 31, 2006.  Separately, the restatement reflects an additional $1.7 million pre-tax charge ($1.1 million after-tax) related to recently identified insufficient payroll tax withholdings in fiscal 2005.

This Quarterly Report on Form 10-Q should be read in conjunction with our Amended Annual Report on Form 10-K/A for the year ended March 31, 2006 filed with the SEC on May 25, 2007 and our Amended Quarterly Report on Form 10-Q/A for the three months ended June 30, 2006 filed with the SEC on June 7, 2007. Information regarding the effect of the restatement on our financial position and results of operations is provided in Note 2 of the Unaudited Consolidated Financial Statements included in Part I, Item 1 of this Report and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part I, Item 2 of this Report.

Financial information included in our previously filed reports on Form 10-K and Form 10-Q, the related opinions of our independent registered public accounting firm, and all earnings press releases and similar communications issued by us, for all periods ended on or before June 30, 2006 should not be relied upon and are superseded in their entirety by the information in our Amended Annual Report on Form 10-K/A for the year ended March 31, 2006 filed

3

with the SEC on May 25, 2007 and our amended Quarterly Report on Form 10-Q/A for the three months ended June 30, 2006 and our Quarterly Report on Form 10-Q for the three months ended September 30, 2006 filed with the SEC on June 7, 2007.

All share and per share information presented in this report has been adjusted to reflect splits and dividends of our common stock.

4