Opera 12.01

What's new in this version:

General and User Interface:
- Several general fixes and stability improvements
- Website thumbnail memory usage improvements
- Address bar inline auto-completion no longer prefers shortest domain
- Corrected an error that could occur after removing the plugin wrapper
- Resolved an issue where favicons were squeezed too much when many tabs were open
- Fixed a problem where the Adobe PDF plugin is picked up and used by Opera

Display and Scripting:
- Resolved an error with XHR transfers where content-type was incorrectly determined
- Improved handling of object literals with numeric duplicate properties
- Changed behavior of nested/chained comma expressions: now expressing and compiling them as a list rather than a tree
- Aligned behavior of the #caller property on function code objects in ECMAScript 5 strict mode with the specification
- Fixed an issue where input type=month would return an incorrect value in its valueAsDate property
- Resolved an issue with JSON.stringify() that could occur on cached number conversion
- Fixed a problem with redefining special properties using Object.defineProperty()

Network and Site-Specific:
- Fixed an issue where loading would stop at "Document 100%" but the page would still be loading
- tuenti.com: Corrected behavior when long content was displayed
- https://twitter.com: Fixed an issue with secure transaction errors
- Fixed an issue with Google Maps Labs that occured when compiling top-level loops inside strict evals
- Corrected a problem that could occur with DISQUS
- Fixed a crash occurring on Lenovo's "Shop now" page
- Corrected issues when calling window.console.log via a variable at watch4you
- Resolved an issue with Yahoo! chat

Mail, News, Chat:
- Resolved an issue where under certain conditions the mail panel would continuously scroll up
- Fixed a crash occurring when loading mail databases on startup

Security:
- Re-fixed an issue where certain URL constructs could allow arbitrary code execution, as reported by Andrey Stroganov; see our advisory
- Fixed an issue where certain characters in HTML could incorrectly be ignored, which could facilitate XSS attacks; see our advisory
- Fixed another issue where small windows could be used to trick users into executing downloads as reported by Jordi Chancel; see our advisory
- Fixed an issue where an element's HTML content could be incorrectly returned without escaping, bypassing some HTML sanitizers; see our advisory
- Fixed a low severity issue, details will be disclosed at a later date