well bt is not the only thing that got added or bettered....
here are some other changes :
Changes Since Opera 9.0 Technology Preview 1User Interface
* New Opera Widgets feature. Widgets are small Web applications that live outside the Opera window. Press F6 to enter widgets mode. See the widgets tutorials for more details.
* Added content blocking feature. Right click on a page and select "Block content", then click on content that you want to block. Alternatively, use Tools > Advanced > Content blocked to manage blocked content.
* Added search shortcut editor. Right click on a form input to add it as a search shortcut, or use Preferences > Search to manage search shortcuts
* Enabled support for BitTorrent.
o New search shortcut 'b' searches BitTorrent
* Added site specific preferences user interface.
o Press F12 and choose Site preferences to set preferences for the current site, or use Preferences > Advanced > Sites to manage site specific preferences.
o Preferences that can be set on a per-site basis can now be accessed using Preferences > Advanced > Sites > Default settings.
* Web page thumbnails are now shown when hovering tabs.
o Thumbnails are also available when switching tabs using Ctrl+Tab. These are disabled by default but can be enabled using the [User Prefs] Use Thumbnails in Window Cycle setting in opera:config.
* Added grouping by date and site to the History panel.
* Added syntax highlighting to source viewer.
* CSS errors are now reported to the message console.
* Tabbed browsing mode now opens a new tab if all existing tabs are closed.
* Local stylesheets can now be specified as a directory using the [User Prefs] Local CSS Files Directory setting, and all stylesheets in that directory will be used to populate the on-demand user stylesheet menu.
* New styles for opera:about, opera:cache, opera:config, opera:error, opera:history, opera
lugins, file: view, and Info panel.
* opera:config says what changes were saved.
* opera:config now allows linking to individual preferences, and searching within headers.
* Simplified bookmarks and Wand dialogs.
* Added keyboard shortcut Ctrl+Enter to auto complete "www" and "com" when used in the address field.
* Ctrl+B can be used instead of Ctrl+Shift+V for paste-and-go.
Messaging and Newsfeeds
* New e-mail header toolbar.
* Improved IMAP folder synchronisation.
* Improved moving of email between IMAP folders.
* Fix for duplicates showing in IMAP sent view.
* Fix for messages showing blank
* Added support for importing and exporting feed lists in OPML format, using File > Import and export.
* Default mail views can no longer be renamed through the mail interface. They can be renamed using language packs.
* Added a warning when sending mail without a subject.
* User stylesheets are no longer applied to mail, news, and chat.
* Added smiley menu to chat and mail toolbars.
* Added CTCP flood protection to IRC chat.
Display
* Added support for CSS 3 opacity.
* Media queries now understand several CSS length units, and can check additional media features.
* CSS rules that are only partially correct (for example, '1px solid notrecognised') are now ignored.
*
* Printing now uses backgrounds from print media instead of screen.
* Text-decoration is retained on absolutely positioned links.
* Attribute selectors now use the specified value of URIs, instead of resolved values.
* Button elements now respect display:none.
* Multiple fixes for styling of legends and fieldsets.
* Allowed coloring of text and backgrounds in option and optgroup elements.
* Fixed a regression with CSS attribute selectors failing to understand percentages.
* Improved handling of tables in ERA.
* Improvements for BIDI, including handling of padding-right, align="justify", and alignment in ERA.
* Improved handling of vertical-align.
* Improved handling of CSS 3 UI element states pseudo-classes.
* The align attribute will now apply to TR, TBODY, THEAD and TFOOT as well. Block-alignment will not be inherited from table or inline-table.
* @import is now supported in user stylesheets.
* Fixed handling of alternate stylesheets in XML.
* Added support for -o-text-overflow:ellipsis, synonymous to text-overflow:ellipsis in the current CSS 3 working draft.
* Updated display:inline handling on tables according to upcoming CSS2.1 specification update.
Changes to defaults
* Anonymous table cells in a display:table; now have a default vertical-align:middle;
* Form default margin-top is now 0, and margin-bottom now 1em.
* Several changes to the default margin and padding of legends and fieldsets.
Script
* getAttribute and related methods now retrieve the specified value of URIs, instead of resolved values.
* Improved DOM error reporting.
* Multiple fixes for XPath and XSLT.
* Fix to prevent reprocessing of scripts when a script element is moved through DOM.
* Enabled getElementById to retrieve elements based on attributes set to the ID type, by the DTD.
* Improved handling of the load event when navigating back and forward through history. See the knowledge base article for more details.
* Improved redrawing of table rows when dynamically changing styles.
* Added Node.text property, equivalent to Node.textContent
* Added support for the Element.currentStyle property.
* Canvas:
o Fix for rect() and fill().
o Added support for standard CSS color styles such as rgb() and color keywords.
o Improved handing of resizing the canvas.
o display:none on images in HTML no longer causes those images to fail to draw in canvas.
o Many path() fixes.
Forms
* Fix for selecting text with different sized fonts in rich text editing.
* Added support for inserthtml, contentreadonly, increasefontsize, and decreasefontsize in rich text editing.
* Rich text editing now allows selection of images.
* XHTML forms are no longer submitted if they do not have an action attribute.
* Added support for the datetime input type.
* Fix to allow inputs to have a large maxlength value.
* Improved keyboard accessibility of Web Forms inputs.
* Enabled the htmlTemplate property.
* Added support for the datalist element and list attribute.
* Added support for Web Forms 2.0 step="any".
* Added support for oninput and onforminput events.
* Removed support for maxlength on file inputs (this section of Web Forms 2.0 has also been changed).
* Added support for Web Forms 2.0 repetition.
Images
* Added support for YCCK and CMYK formats in JPEG images.
* Multiple improvements to SVG 1.1 basic and SVG DOM support.
Plug-ins
* Initial implementation of NPP_GetValue().
* Re-enabled scripting of plug-ins with Java using LiveConnect.
Security
* Updated expired TrustCenter root certificates.
* Fixed a TLS Extensions format error.
* Security bar is now greyed for sites using an encrypted connection, that have a low security rating.
Miscellaneous
* Rewrote server push handling.
* Fixed handling of target="_top" and target="_parent".
* Removed support for the Content-Location HTTP header as a base HREF.
* Site patching can now download certain site specific preferences as well as Browser JavaScript and user agent overrides.
* Multiple stability fixes.
Windows-specific changes
* Added experimental support for NTLM authentication.
* Fix for importing Internet Explorer favorites.
* When first run, Opera will attempt to import bookmarks from the default browser. Internet Explorer, Firefox, and Opera are supported.
* Known issues with widgets on Windows 95, 98, ME and NT:
o Widgets may fail to render correctly.
Opera 9 to Include BitTorrent
.guys whats happening, there are two threads on opera 9 in this forum 
Linear Mode
