Optimized the invalidation of Page Output Cache so that only some actions (e.g. publish\unpublish\delete of a page) cause cache invalidation. As a result, the overall performance of the system is improved.
Added new setting on a system level which determines if a change of Permission should invalidate the output cache for pages.
Pages
Error when you duplicate a page, change its parent and create another language version
Performance improvement in page templates screen loading time
Changes on page layout result in Index must be within the bounds of the List. Parameter name : index exception. (PITS)
Search
Forum re-indexing performance improvements
Forms
IFormEntryCreatedEvent now provides FormId and FormName properties
E-mail notification template typo fixed ("submition" changed to submission")
Login
Infinite redirect issue with backend user login from different browsers.
Backend user is not logged in correctly using the frontend login widget, and logged in another browser (PITS)
Security
Visiting a page under https causes all subsequent pages to be served under https as well (PITS). Could be configured in Settings > Advanced > System > SiteUrlSettings > RemoveNonRequiredSsl
Forums
Using thread filters (e.g. "Newest") results in error 404 ("page not found")
Performance improvement in last post ID recalculation query
Site Sync
Page templates - on the target server all permissions are set to "Administrators Only"
Performance problem with granular sync service with 4000+ pending items
User is unable to upload mobile application to Icenium
Ecommerce
Added support for the USPS changes from July 28, 2013, related to Priority Mail® and Express Mail®. More information can be found here
Twitter
LinqToTwitter was upgraded to the newest version (2.1.08) to incorporate a critical compatibility fix with the latest changes in Twitter's API (read more)
Breaking Changes
Forms
IFormEntryCreatedEvent - to achieve a cleaner API some irrelevant properties were removed and some were renamed (previously used only by the e-mail notifications implementation)