Prospectus
Supplement No. 6
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Filed
Pursuant to Rule 424(b)(7)
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(To
Prospectus dated April 18, 2006)
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Registration
Statement No. 333-133353
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Investing
in our common stock involves risks. See “Risk Factors”
beginning on page S-8 of the prospectus supplement dated August 23, 2007,
as well as in the documents incorporated by reference in the prospectus
supplement dated August 23, 2007 and “Risk Factors” beginning on page 5 of
the prospectus dated April 18, 2006.
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Selling
Stockholder
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Number
of
Shares Beneficially Owned Prior to the Offering (1)(2) |
Percentage
of
Shares Beneficially Owned Prior to the Offering (3) |
Number
of Shares
Offered Pursuant to this Prospectus Supplement (1)(2) |
Number
of
Shares Beneficially Owned After the Offering (4) |
Percentage
of
Outstanding Common Stock Beneficially Owned Following the Offering (3) |
Argent
LowLev
Convertible Arbitrage Fund Ltd. (5) |
50,910
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*
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50,910
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0
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0
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Canyon
Capital
Arbitrage Master Fund Ltd. (6) (11) |
113,735
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*
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113,735
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0
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0
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The
Canyon Value
Realization Fund (Cayman) Ltd. (7) (11) |
123,484
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*
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123,484
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0
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0
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Canyon
Value
Realization Fund, L.P. (8) (11) |
47,119
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*
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47,119
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0
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0
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Canyon
Value
Realization MAC 18 Ltd. (9) (11) |
8,124
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*
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8,124
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0
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0
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Class
C Trading
Company, Ltd. (5) |
44,772
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*
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44,772
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0
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0
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LYXOR/Canyon
Capital Arbitrage Fund Limited (10) (11) |
32,496
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*
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32,496
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0
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0
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(1)
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Based
on information available to us as of May 16, 2008. The sum of
the number of shares beneficially owned by the selling stockholders named
in this table and named in the table in the prospectus supplements dated
August 23, 2007, September 11, 2007, October 30, 2007, March 17, 2008 and
April 29, 2008, exceeds 6,499,134 shares of common stock (the total number
of shares offered pursuant to the prospectus supplements) because certain
selling stockholders may have transferred notes or otherwise reduced their
position prior to selling pursuant to this prospectus supplement, and as a
result we received beneficial ownership information from additional
selling stockholders. However, the maximum number of shares of
common stock that may be sold pursuant to the prospectus supplements will
not exceed 6,499,134 shares.
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(2)
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The
number of shares of common stock issuable upon the exchange or redemption
of the notes assumes exchange of the full amount of notes held by each
selling stockholder at the initial exchange rate of 36.1063 shares of our
common stock per $1,000 principal amount of notes and a cash payment in
lieu of any fractional shares. The exchange rate is subject to
adjustment in certain events.
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(3)
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Based
on a total of 74,400,213 shares of our common stock outstanding as
of May 16, 2008.
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(4)
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Assuming
the selling stockholder sells all of its shares offered pursuant to this
prospectus supplement.
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(5)
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Guy
Caplan exercises voting and/or dispositive power with respect to these
securities.
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(6)
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Canyon
Capital Advisors LLC is the investment advisor for Canyon Capital
Arbitrage Master Fund Ltd. and has the power to direct investments by
Canyon Capital Arbitrage Master Fund, Ltd. The managing
partners of Canyon Capital Advisors LLC are Joshua S. Friedman, Mitchell
R. Julis and K. Robert Turner. Canyon Capital Arbitrage Master
Fund, Ltd. is a Cayman Islands exempted
company.
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(7)
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Canyon
Capital Advisors LLC is the investment advisor for The Canyon Value
Realization Fund (Cayman) Ltd. and has voting and investment power with
respect to these securities. The managing partners of Canyon
Capital Advisors LLC are Joshua S. Friedman, Mitchell R. Julis and K.
Robert Turner.
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(8)
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Canpartners
Investments III, L.P. and Canyon Capital Advisors LLC have voting and
investment power with respect to these securities. The general
partner for Canyon Value Realization Fund, L.P. is Canpartners Investments
III, L.P. Canyon Capital Advisors LLC is the general partner of
Canpartners Investments III, L.P. The managing partners of
Canyon Capital Advisors LLC are Joshua S. Friedman, Mitchell R. Julis and
K. Robert Turner.
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(9)
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Canyon
Capital Advisors LLC is the investment advisor for Canyon Value
Realization MAC 18, Ltd. and has voting and investment power with respect
to these securities. The managing partners of Canyon Capital
Advisors LLC are Joshua S. Friedman, Mitchell R. Julis and K. Robert
Turner. Canyon Value Realization MAC 18, Ltd. is a Limited
Liability Cayman Islands company.
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(10)
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Canyon
Capital Advisors LLC is the investment advisor for LYXOR/Canyon Capital
Arbitrage Fund Limited and has voting and investment power with respect to
these securities. The managing partners of Canyon Capital
Advisors LLC are Joshua S. Friedman, Mitchell R. Julis and K. Robert
Turner.
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(11)
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The
selling stockholder is under common ownership with Canyon Partners
Incorporated, a registered broker-dealer. The selling
stockholder certifies that it purchased the securities in the ordinary
course of business, and that at the time of the purchase of the securities
to be resold, it had no agreements or understandings, directly or
indirectly, with any person to distribute the
securities.
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