Следует заметить, что для среды Windows 7 разработчики по умолчанию отключили предпросмотр всех открытых вкладок из-за того, что большое число вкладок смущало некоторых пользователей. Включить эту функцию заново можно в разделе «Вкладки» в диалоге «Настройки». Для среды Mac OS X новшества оказались более значимыми – после полной переделки каркаса Opera в версии 10.50, когда браузер перевели с платформы Carbon на Cocoa, разработчики вернулись к своей работе и вычистили максимально возможное количество кода, написанного специально для платформы Carbon. Те участки Carbon-зависимого кода, что остались, загружаются динамически, что положительно сказалось на скорости работы. Пользователям Mac следует помнить, что Java-апплеты смогут работать в браузере для среды Mac OS 10.5 и 10.6 только при установке самого свежего обновления Java. В среде Mac OS 10.4 технология Java вообще не поддерживается.
Для пользователей Unix и Unix-подобных платформ новости заключаются в том, что под эти платформы версия 10.5x так никогда и не появится. Вместо этого, одновременно с другими платформами, будет выпущена версия 10.60 со всеми новыми функциями.
У текущей альфа-версии есть известные проблемы, включая некорректное масштабирование значков заголовка во время предпросмотра вкладок, ошибки при работе с веб-шрифтами в средах Mac и Unix, а при занесении быстрых цитат в записную книжку My Opera иногда сбрасывается выделение текста.

Вот два ролика демонстрирующих противостояние двух браузеров Google Chrome и Opera.

Полный Changelog Opera 10.60 Alpha 1
Desktop/UI
• Updated version number to 10.60
• Use icons instead of thumbnails for some internal tab types, such as mail and downloads
• Fixed DSK-239575 (Zoom box in email compose page is broken)
• Fixed DSK-284115 (Mail not re-indexed after removing lexicon)
• Fixed DSK-285118 (Tab chrome is missing for restored tab when new tab is opened in background)
• Fixed DSK-288581 (MathML entities don't work in Opera 10.5x)
• Fixed DSK-290704 (Make scrollbar knob bigger with big pages)
• Fixed DSK-291718 (Minimized Opera not restored when opening external link)
• Fixed DSK-292233 (Opera crashes on uninstalling widgets via the panel)
• Fixed DSK-292307 (Can't remove widgets with Cyrillic name)
• Fixed DSK-295244 (Inspect Element should not be the last item in Image Properties)
• Fixed DSK-296724 (Crash viewing Opera skin images on a page while using the Omelion skin)
• Fixed DSK-297250 (Opera crashes in Save As and Open dialogs)
• Fixed DSK-297282 (Crash on right clicking Google Earth plugin)
• Fixed DSK-297390 (Issues with focus in Google Earth plugin)
• Fixed DSK-297560 (Missing toolbar after starting with new page if source viewer was previously active tab)
Speed Dial
• Fixed DSK-293919 (Dragging speed dial entry to another position executes default action on target in addition to dropping)
• Fixed DSK-297432 (Close button: Visual glitch)
• Fixed DSK-297814 (Background of Speed Dial dialogs too transparent)
• Fixed DSK-298063 (When Speed Dial is set Read Only, no titles are shown)
• Fixed DSK-298098 (Visual degradation when setting opacity to a low value (disabling opacity for now))
• Fixed DSK-298364 (Crash when hovering Speed Dial tab)
• Fixed DSK-299663 (Buttons at the bottom overlap when height is reduced)
Core
• Fixed CORE-192 (Remove support for div nowrap)
• Fixed CORE-1386 (MouseEvent and UIEvent interfaces not exposed)
• Fixed CORE-14878 (0.01% height of auto in standards mode should compute to auto but doesn't (Picasa))
• Fixed CORE-19575 (E-mail contact importer on www.hi5.com triggers file download)
• Fixed CORE-19880 (Don't differentiate between shrink-to-fit and table cell content width propagation)
• Fixed CORE-20102 (Absolutely positioned element inside bottom absolutely positioned element doesn't redraw when moved)
• Fixed CORE-20449 (--!> and --\s*> do not close a comment)
• Fixed CORE-21628 (Scripts hang at www.toshiba.co.jp (plugin related))
• Fixed CORE-22498 (location.replace in iframe turns previously initiated location.href assignment in parent into a replace)
• Fixed CORE-22761 (Address shouldn't have padding)
Fixed CORE-22879 (Cell width larger than that of table if cell has nowrap should be respected only in quirks mode)
• Fixed CORE-23522 (HTML5: Add support for onhashchange events)
• Fixed CORE-23560 (Negative clip left/top value, larger than elements widht/height hides element)
• Fixed CORE-23989 (Navigating to a different WML card via element doesn't work)
• Fixed CORE-25367 (After acceptation of certificate, SSL negotiation fails in some circumstances)
• Fixed CORE-25463 (Combination of z-index, display, overflow, position and float hides content at Google Wave)
• Fixed CORE-25786 (Reading empty cookie value still appends = (jil.org))
• Fixed CORE-26001 (CSS selector matching performance improvement)
• Fixed CORE-26027 (Caret appears in the wrong position if put in an empty block beside a float (new reply on Google Wave))
• Fixed CORE-26647 (Freeze caused by nesting positioned and non-positioned elements)
• Fixed CORE-26674 (Content overflowing content edge but not padding edge triggers scrollbar for overflow:auto)
• Fixed CORE-26824 (Mouse coordinates wrongly reported to Flash)
• Fixed CORE-27299 (Zimbra: UI freezes when closing calendar item — history.back() causes unload event)
• Fixed CORE-27385 (Can't install Skandiabanken CA certificate)
• Fixed CORE-27402 (Navigator mimeTypes description is wrong)
• Fixed CORE-27532 (liveConnect TCs show undefined until Reload)
• Fixed CORE-27600 (Odd XSLT behaviour with (non-URI) ihost names)
• Fixed CORE-27693 (Cant view Google Pistview — document.readyState can revert to "interactive" from "completed" when content is added to the DOM)
• Fixed CORE-27730 (Nested positioned descendants of inline-block fails to redraw)
• Fixed CORE-27774 (Float and clear tests regressed — empty line inserted)
• Fixed CORE-27826 (Nested positioned descendants of inline-block with z-index fails to redraw)
• Partially Fixed CORE-27877 (The separator between attributes and params should be PARAM:null, not PARAM:"")
• Fixed CORE-27900 (Animated Harmonograph Experiment not animated)
• Fixed CORE-28143 (Unexpected 14px offsetTop for page when close a inner window for web.qq.com)
• Fixed CORE-28213 (Danskebank not working — let document.domain affect frame navigation policy)
• Fixed CORE-28444 (Windowless plugin desynchronizes with page after scrolling)
• Fixed CORE-28845 (Don't set the focus on DocumentEdit when handling an onfocus event on the body)
• Fixed CORE-28943 (Can't enable plugin by clicking arrow on this page (EnableOnDemandPlugin/EnableOnDemandPluginPlaceholder))
• Fixed CORE-29028 (Optimize premultiplication of decoded images)
• Fixed DSK-275537 (Chinese IME causes Opera to crash when typing on tieba.baidu.com)
• Fixed CORE-30034 (Webstorage crash)

Windows
Fixed DSK-294923 (Disable taskbar thumbnails by default and make an option in preferences)
Mac
• Fixed DSK-299441 (Drop JEP in favour of javaplugin2 (ns4) – more info)
• Fixed DSK-299267 (Slow element reflow with some italic fonts)
• Fixed DSK-298779 (Pinch to zoom gesture in compose screen crashes Opera)