| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 25-Sep-07 | Punk, Ziegel & Co | Downgrade | Buy | Mkt Perform | | 14-Nov-05 | Needham & Co | Initiated | | Buy | | 5-May-05 | Wedbush Morgan | Initiated | | Buy | | 16-Mar-05 | Punk, Ziegel & Co | Upgrade | Accumulate | Buy | | 20-Oct-04 | Punk, Ziegel & Co | Downgrade | Buy | Accumulate | | 12-Feb-02 | Punk, Ziegel & Co | Initiated | | Buy | | 16-Oct-98 | Hambrecht & Quist | Downgrade | Buy | Hold | | 7-Oct-98 | BT Alex. Brown | Downgrade | Buy | Mkt Perform | | 27-Feb-98 | Hambrecht & Quist | Downgrade | Strong Buy | Buy |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | | | | | | Buy | | | | | | Hold | | | | | | Underperform | | | | | | Sell | | | | |
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