| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 8-Mar-06 | Canaccord Adams | Downgrade | Buy | Hold | | 7-Sep-05 | Needham & Co | Downgrade | Buy | Hold | | 7-Jul-05 | Wells Fargo Sec | Initiated | | Buy | | 2-Dec-04 | RBC Capital Mkts | Downgrade | Outperform | Sector Perform | | 2-Dec-04 | Needham & Co | Initiated | | Buy | | 18-May-04 | RBC Capital Mkts | Initiated | | Outperform | | 2-Apr-04 | WR Hambrecht | Initiated | | Buy | | 29-Sep-03 | Adams Harkness | Upgrade | Buy | Strong Buy | | 8-Jan-03 | Adams Harkness | Upgrade | Mkt Perform | Buy | | 2-Dec-02 | Needham & Co | Upgrade | Hold | 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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