这个 snapshot 主要提升了软件渲染性能，当你的处理器支持 SSSE3 指令集时。
可以看下在测试机上运行 canvasbench, Retro DOM, Retro Canvas 三项测试的对比，看起来的确是有可观的提升。

在 Bug 修复方面也有很大进展：
修复了 HTML5 拖放在各平台上的一大堆问题。
修复了一大堆邮件客户端的问题，包括很多人都关注的 64位系统中 POP 的崩溃。

并且，添加了全局自定义 User-Agent 的选项：Custom User-Agent。在 1413 的时候就乌龙了一下，更新日志出现这个特性 Orz。
（不推荐长期伪装成其他的浏览器 UA 来运行，不利于市场份额统计。加入这个选项的主要用意是，当浏览一些网站碰到加载或显示问题时，可以方便的排查是由于 Opera 不完全支持它引起的还是因为浏览器嗅探导致的。）

可以通过这个页面来查看你当前的详细 UA 信息。

这是一个开发版，不推荐普通用户使用，仅供测试。此版本存在着很多已知问题，可能会造成崩溃或者数据丢失，甚至无法正常使用。请勿覆盖之前的版本，并在备份数据后安装使用。

下载链接

Windows 32-bit / Windows 64-bit

Mac (Universal Binary 32/64-bit)

Linux/FreeBSD

更新日志
Core

CORE-46394 LocalStorage does not work on page that uses Application Cache

CORE-46313 Drag’n'drop trigged instead of panning map on Google Maps

Desktop

DSK-363749 Implement assembler optimized versions of pixel handling bottlenecks: Performance improvements in software rendering when SSSE3 is available. This also speeds up WebGL when only WebGL and not full hardware acceleration is enabled.

DSK-364146 Crash on painting smaller on top of bigger window (e.g. Dragonfly)

DSK-363111 Crash using custom protocol handler

DSK-360740 Crash when rightc lick on a link – open in new tab: with active memguard

DSK-359705 [html5dnd] Dragging an image or link to the Tab Bar of a background window crashes

DSK-359365 [html5dnd] Inconsistent use of icons and “droppable” indicators

DSK-363145 Tab close button is not ignored over inactive background tab when tab width is narrow

DSK-340052 Tab spinner spins forever when there is an auth dialog in the tab

DSK-362447 OMenu disappearing after changing some preferences

DSK-363937 Barely readable text in the progress bar set to open at the bottom

DSK-358912 Disabling Show Network Speed Notification preference does not disable Turbo notification on start up

DSK-363187 Offer Custom User-Agent User Pref to allow for debugging problematic sites

DSK-359140 Need to Limit number of times Opera Turbo slow network notification is shown in a session

Mail

DSK-360051 [Win x64] Opera crashes when checking POP

Split up threads when the subject changes

Include duplicate mails in threads and their parents / child messages.

Improve pasting of multi-line texts into HTML compose window

Changed mail compose window toolbar layout

DSK-362058 Change tab order of the attachment field in mail compose window

DSK-362304 MAPI not responding after Opera crashed

DSK-361727 [Mac] Drag’n'drop of attachment with spaces in name fails

DSK-362065 First few body lines missing when printing

DSK-363650 Syncing unsubscription from Gmail folder removes all copies of messages from that folder

DSK-355593 Sending attachments with MAPI, Opera does not grab focus

DSK-362177 Setting for “Default outgoing account” doesn’t work

DSK-359260 No more IMAP email received after connection gets lost

DSK-360286 Attachments displayed in reversed order

DSK-361646 Can’t open second file attachment in compose window by double clicking

DSK-362042 External mailto-links don’t open compose window when Opera is already running

DSK-362133 Too long attachment name prevents expand button from showing

DSK-362224 IRC properties dialog, outgoing, has overlapping text

DSK-349059 [RTL] When UI is in RTL mode, welcome mail should RTLify

DSK-362471 [RTL] text inside To, CC, BCC buttons left-aligned

DSK-363492 Crash when right clicking empty mail message window

DSK-363607 Unchecking “Reuse current tab” should not cause new mail windows to appear on clicking in Mail panel

DSK-364068 Cut and Paste using context menu not working in compose window

DSK-199168 Don’t copy but move, when dragging addresses between fields in compose window

DSK-360126 Shortcut for focusing Quick Reply field doesn’t work

DSK-361669 After sending a Quick Reply, focus not moved to message area

DSK-362277 Only one row updates while scrolling message list with keyboard

DSK-356371 Occasional crash when dismissing password dialog for feed

DSK-362057 [Linux/FreeBSD] Add attachment keyboard shortcuts for compose window to 9.2 compat and unix setups as well

Windows

CORE-45931 [HWA] [WebGL] Normal vectors seem to have wrong direction on DX10

DSK-333300 Web fonts doesn’t work under user with non-ascii letters in account name

DSK-359176 [html5dnd] Crash dragging a session onto Opera

DSK-361724 [html5dnd] Windows installers crashes when dragging text in Install Path

DSK-363409 [html5dnd] Crash on dragging buttons from Appearance

DSK-363403 [html5dnd] Crash on dragging tabs between Opera Windows

DSK-363118 [html5dnd] ‘link’ modifier misbehaves

DSK-359751 [html5dnd] Dragging downloads from manager to desktop creates shortcut and not a copy

DSK-363324 [html5dnd] Can’t drag text from external application to text field in Opera

Mac

DSK-363456 Year 2012 shows up as year 2128 in date fields

DSK-363536 Memory leak on resizing window

DSK-362002 [html5dnd] Occasional crash when Drag and dropping

DSK-361799 [html5dnd] Drop-return animation doesn’t have the correct return position

DSK-362001 [html5dnd] Drag and drop Ctrl+Shift modifiers are not supported

DSK-363824 [html5dnd] Crashes when coming in contact with files dragged from Cyberduck

Linux/FreeBSD

DSK-361978 [html5dnd] Crash during Drag and Drop testing

DSK-361990 [html5dnd] Modifier keys don’t work

[ Via Opera Desktop Team - Opera.IM 编译 ]