Important Note: For customers upgrading to 4.0 from a previous release, please read this KB regarding additional steps that must be taken after running the Vizit Installer: http://support.vizit.com/entries/20226016-upgrading-to-vizit-4-0

• Improved document format support
• Removed requirement to add Vizit web part to pages (SharePoint 2010 only)
• Improved client-side API
• Added configurable keyboard binding to control interfaces
• Added Instant Preview feature
• Made more intuitive error messaging in Vizit Pro when the cache is improperly configured
• Browser window will now move to front when Pro has already been opened and minimized or covered by other windows
• Pro is now opened in full-screen mode
• Ability to enable/disable Instant Preview
• Support to add Vizit buttons to more web parts, including Relevant Documents web part and Popular Documents web part
• FAST search integration
• Rearrange Pages and Save Dialogs now behave better when the Vizit Pro window is smaller.
• Vizit Essential can now be opened in an external browser window using the VCL (Vizit Client Library)
• Added onBeforeSave event to configuration profile, allowing more granular control to documents as they pass through Vizit's pipeline
• Included SharePoint client-side object model with Pro allowing more SharePoint integration for implementors (SharePoint 2010)
• Fixed issues with Licensing configuration page
• Fixed various issues with Vizit Scanning
• Fixed issues with Loading and Message window masks in Vizit Essential.
• Fixed a bug causing some Fax images to display incorrectly
• Closed some memory leaks when using Vizit Essential
• Fixed a bug in Vizit Pro where the document tab did not extend fully to the right of the page
• Fixed a bug with Solution Installer where it would allow the user to use the Cancel button, leaving the Farm in an un-clean state
• Fixed a bug where Vizit would not work in IE9
• Fixed a bug with Property Editor, where lists with newly required fields caused a validation error on load
• Fixed typos in EULA
• Fixed an issue with Solution Installer that caused the Vizit.Admin feature not to activate on the Central Administration server on installation in SharePoint 2007.
• Fixed an issue where a licensed farm would need to reactivate on upgrade
• Vizit buttons and Vizit Essential fail to load when used with certain localizations due to syntax errors with strings with line-breaks.
• It is now possible to select which servers within your farm a license is applied to
• Fixed an issue with page manipulation dialog where un-doing a delete would not undo deletion of the page selected
• Fixed an issue where Vizit would not work on search results pages when FAST was selected as the Farm's default search provider
• Fixed an issue where certain document titles would cause Vizit to stop working
• Fixed a bug in Pro configuration profiles where the return parameter from IsEditMode in the Property Editor's onLoad event returned Null
• Fixed an issue in Pro that caused the delete key to fail during rearrange/delete operations
• Fixed some localization strings in Vizit Pro
• Fixed a bug where Vizit would fail to load when not using the designated HTTP or HTTPS port (80 and 443 respectively).
• Fixed a bug that caused Vizit Pro to check out a document when the Property Editor view was toggled
• Fixed a bug where clicking on another document in a list view when Pro was already open would cause Pro to reload with the new document, losing any changes on the previously opened document
• Fixed error messaging using Vizit Scanning when Scanning was not licensed
• Removed the requirement for a Target location when opening Vizit Essential
• Increased speed with which Vizit loads onto a page
• Permanently removed the Vizit custom field type (deprecated as of version 3)
• Improved document caching and memory management
• Fixed a display bug with FAST Search results, where with Vizit on the page, search results could overlap
• Fixed an issue with Vizit Pro where it would not clean up some temporary files
• Fixed an issue where the rearrage/delete dialog disallowed rearranging of pages in Internet Explorer and FireFox
• Fixed an issue with Vizit Scanning when scanning into document libraries with field validation enabled
• Fixed an issue with Vizit Essential where in embedded mode the window would show additional scroll bars in Chrome
• Fixed an issue with Vizit Pro that caused the window to be obscured by the start bar when using the Chrome browser
• Fixed an issue that caused Vizit Pro to perpetually show the "Loading..." message when using IE9
• Fixed an issue with annotation placement in Vizit Pro for multi-page documents
• Fixed an issue where Vizit Pro failed to load if the Document Explorer grid was disabled by configuration profiles
• Added a ToolsPanel configuration profile section allowing individual control over the collapsed states of the Annotation Tree and Property Editor in Vizit Pro
• Fixed an issue that caused documents with annotations to be marked as Modified immediately after being opened in Vizit Pro
• Fixed an issue with Vizit Essential where error messages were not hidden when trying to open a new document
• Fixed an issue with Property Editor where a column with more than 21 items to choose from would fail using IE
• Fixed an issue that caused certain single-paged PDFs to fail to render using Vizit Essential
• Fixed a bug with Vizit Pro where search results would not be displayed for any but the first search
• Fixed a bug in Vizit Pro where the Document Explorer tab would navigate up more than one folder
• Fixed a bug with Vizit when used on search results pages that had no results
• Fixed an issue where when Vizit takes over document download links, Office document types would continue to download instead of being opened in Vizit
• Fixed issues with column search in Pro where certain column types would cause search to fail
• Fixed an issue in Vizit Pro using column search where it appeared as though the results could be sorted by the preview column
• Added tooltips to column names in Vizit Pro search for long column names 
• Fixed an issue with the Property Editor where switching a document's content type would cause an error
• Fixed an issue with Vizit.API.CheckOut that caused failure when the document had annotations when that document was stored in a sub-site
• Vizit Essential handles button overflow better for smaller-sized windows
• Fixed an issue in Vizit Essential that caused the mouse cursor to display as a pan cursor when in the scroll bars and buttons
• Fixed an issue where Vizit could not resolve documents whose URL included some special characters
• Fixed an issue where Vizit Pro would reset its zoom level after some editing operations
• Added handling of boolean fields in column search for Pro
• Vizit will now work on pages using "Group By" filtering