Opera 10.51 for Windows changelog

Release notes

Release date: March 22, 2010

Opera 10.51 is a recommended security and stability upgrade. Opera highly recommends all users to upgrade to Opera 10.51 to take advantage of these improvements.

Changes since Opera 10.50 (with Opera Widgets for Desktop)

User Interface

  • Drag and Drop not working in some instances
  • Deleting a bookmark closing/collapsing all folders
  • Focus being lost when deleting bookmarks
  • Integrated search performing searches in Google and not in the page
  • The Opera O menu button reappearing when the Menu bar is enabled
  • The Opera icon remaining in the system tray after closing Opera
  • Minimized tabs not displaying after a restart
  • Favicon not being added to Bookmarks due to a question mark in the filename
  • Individual characters in Chinese text being rotated anti-clockwise

Mail, News, Chat

  • A problem occurring when right-clicking entries under "All messages" and selecting Compose
  • Chat notification appearing if a chat tab is active
  • Ghost e-mails appearing in the Trash folder after emptying it and restarting Opera
  • Message not loading when it is deselected and selected again
  • Mail being blank when using fit to width
  • Attached files not being sent if mail is sent immediately after attaching them
  • Opera Mail welcome e-mail message not being localized
  • The text part of HTML e-mails missing the reply character " > " for block quotes

Display and scripting

  • Numerous improvements to the Carakan JavaScript engine
  • Icons missing from menus in 16-bit color mode
  • Slow scrolling performance
  • Incorrect font used for a UTF-8 encoded page without the language (CJK) being specified


  • Fixed an issue where the HTTP Content-Length header could be used to execute arbitrary code; see our advisory (http://www.opera.com/support/search/view/948/).
  • Fixed an issue where XSLT could be used to retrieve random contents of unrelated documents, as discovered by crazypops; see our advisory (http://www.opera.com/support/search/view/949/).


  • Cookies:
    • Cookies received over NPAPI being incorrectly parsed
    • Reverted the blocking of third party cookies by default
    • Opera sometimes storing a cookie for the domain it came from, rather than the set domain


Opera Help

Need help? Hit F1 anytime while using Opera to access our online help files, or go here.