On May 5, 2009 Open Text Corporation ("Open Text"), Vignette Corporation, a Delaware corporation ("Vignette"), and Scenic Merger Corp., a Delaware corporation and a wholly owned subsidiary of Open Text ("Merger Sub"), entered into an Agreement and Plan of Merger (the "Merger Agreement"), pursuant to which Open Text and Vignette will combine their businesses through the merger of Merger Sub with and into Vignette (the "Merger").

Pursuant to the terms of the Merger Agreement and subject to the conditions thereof, at the effective time of the Merger (the "Effective Time"), each share of common stock of Vignette issued and outstanding immediately prior to the Effective Time will be converted into the right to receive $8.00 in cash, without interest and 0.1447 of one share of Open Text common stock.

The Board of Directors of Vignette has approved the Merger and the Merger Agreement. The completion of the Merger is subject to various closing conditions, including obtaining the approval of Vignette's stockholders and receiving antitrust approvals (including under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended).

The foregoing description of the Merger Agreement is qualified in its entirety by reference to the full text of the Merger Agreement, which is attached to this Current Report on Form 8-K as Exhibit 2.1 and incorporated herein by reference in its entirety. The Merger Agreement has been attached to provide investors with information regarding its terms but is not intended to provide any other factual information about Open Text or Vignette and you should not rely on the representations and warranties in the Merger Agreement as characterizations of the actual state of facts about Open Text or Vignette.

On May 6, 2009, Open Text and Vignette issued a joint press release announcing the execution of the Merger Agreement. A copy of the press release is furnished hereto as Exhibit 99.1 and incorporated herein by reference in its entirety.

(d) Exhibits.

Exhibit No.       Description
2.1               Agreement and Plan of Merger dated as of May 5, 2009, by and
                  among Open Text Corporation, Scenic Merger Corp. and Vignette
                  Corporation.

99.1              Joint press release dated May 6, 2009.

Additional Information and Where to Find It

In connection with the proposed transaction, Open Text will file with the Securities and Exchange Commission (SEC) a Registration Statement on Form S-4 that will include a proxy statement of Vignette that also constitutes a prospectus of Open Text. The proxy statement/prospectus will contain important information about Open Text, Vignette, and the proposed transaction. Open Text's and Vignette's shareholders will be able to obtain a copy of the proxy statement/prospectus and other relevant documents, when they become available and without charge, at the SEC's Internet site (http://www.sec.gov).

This Current Report on Form 8-K contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including but not limited to, statements regarding the expected closing of the proposed Merger. These forward-looking statements involve certain risks and uncertainties that could cause actual results to differ materially from those indicated in such forward-looking statements, including, but not limited to, the ability of the parties to consummate the proposed Merger, satisfaction of closing conditions precedent to the consummation of the proposed Merger, the ability of Open Text to successfully integrate Vignette's operations and employees, the ability to realize anticipated synergies and cost savings of the proposed Merger, and such other risks as identified in Open Text's Annual Report on Form 10-K for the fiscal year ended June 30, 2008 that contains and identifies important factors that could cause the actual results to differ materially from those contained in the forward-looking statements. Open Text assumes no obligation to update any forward-looking statement contained in this Current Report on Form 8-K.