Debugging Tools:

• Set breakpoints within the source editor, both inside and outside functions
• View object values and call stack during debugging
• Step through code line by line
• Error inspector for quick access to tracebacks and debugger after runtime errors
• Integration with traditional R debugging tools, such as browser() and debug()

• Browse any environment on the search path
• Filtering by name/value
• Expand lists, data frames, and S4 objects inline
• Use str() for displaying object values
• Optional grid view sortable by various attributes
• Many other small correctness and robustness enhancements

• Easy authoring of HTML5 presentations based on R Markdown
• Extensive support for authoring and previewing inside the IDE
• Many options for customizing layout and appearance
• Easily published as either a standalone HTML file or to RPubs

• Use Rcpp template by default for new C++ files
• Add code folding for markdown headings/sections
• Option to not restore source documents when re-opening projects
• Preserve open source documents when underlying project directory is moved
• Ability to execute roxygen example code via Cmd/Ctrl+Enter
• Change fold/unfold all keyboard shortcut to use 'O' rather than '0'
• Automatically insert a newline at the end of R scripts when executing the last line in the file
• Don't advance cursor after execute code if there is a selection
• Detect and provide notification when editing readonly files (Linux and OSX only)
• TeX syntax highlighting for .dtx and .ins files
• Allow opening application/postscript files in the editor
• Scroll to cursor when reactivating the source pane via the keyboard shortcut
• Improve clarity of error message for moved or deleted source files
• R code automatic indentation now adapts to alternate indentations on subsequent lines
• Execute multi-line statements even when line delimiter is plain r

• Control+Enter can now execute commands in the console
• Allow Esc key to interrupt the console even if used when focus is in the source editor
• Scroll to cursor when reactivating the console via the keyboard shortcut

• User option to disable the Packages pane (useful if there are hundreds of packages installed)
• Environment variable (RSTUDIO_DISABLE_PACKAGES) that can be used to entirely disable the Packages pane.
• Build packages using --with-keep-source by default
• Correctly set LC_COLLATE for roxygenize (now works the same as devtools)
• Automatically focus console after devtools Load All command

• knitr 1.2 is now the minimum required version
• Higher fidelity parsing of knitr error messages
• MathJax compatability mode for IE 10
• Correctly base64 encode images with special characters in their paths
• Read the Sweave template from the filesystem (resources/templates/sweave.Rnw)
• Update Windows PDF viewer to Sumatra PDF v2.4

• New Viewer pane for viewing local web content within RStudio
• Works with files written to the R session temporary directory or arbitrary localhost URLs

• Replaced Qt with native Cocoa implementation for Mac desktop to improve performance
• RStudio can now build on OS X Mavericks with the latest version of XCode
• Support the AppNap API on OS X Mavericks to prevent CPU throttling when R is busy
• Use domain sockets (Linux/OS X) and named pipes (Windows) for R session communication rather than TCP/IP
• Allow R help http server to handle custom URLs directly
• Significantly more robust detection of user home paths on Windows
• Detect R on OS X even if /usr/bin/R has been deleted
• Add option to create projects in a new window
• Abilty to create Shiny applications directly from the New Project dialog
• Display row.names in data viewer
• Compatiblity with Rtools 3.1 (R-devel)
• Added previewRd function to RStudio package
• Keyboard shortcut (Ctrl+Shift+F10) for restarting R session
• Don't add commands to history when Browser> context is active
• Limit size of history database file to approximately 1 MB
• Move History button to main toolbar for Git VCS
• Always use code-search dialog for Go To Function
• Treat objects of type data.table and cast_df as data in the environment pane
• New RSTUDIO_HTTP_REFERER environment variable for detecting the full client URL in server mode
• User option to disable automatic checking for updates to RStudio
• Environment variable (RSTUDIO_DISABLE_CHECK_FOR_UPDATES) that can be used to disable automatic checking for updates to RStudio
• Improved error message for failure to start due to version mismatch between libR and loaded packages
• Disable spell-checking in VCS commit message widget
• Add .travis.yml to the whitelist of hidden files displayed in the Files pane
• Fix inability to change default working directory on Ubuntu 13.10
• Block iframes with remote URLs rather than showing them in a new window

• Localhost URLs (e.g. for Shiny, Rook, or OpenCPU applications) are now automatically proxied back to remote clients on the main server port.
• Add upstart script for RedHat/CentOS 6
• No longer specify unlimited core size in upstart script
• More permissive AA profile during startup (ability to auto-detect R in more locations)
• Enhance fidelity of callstacks for client-side errors
• Respect X-Forwarded-Proto header required for redirects when running behind SSL proxies
• Deprecated rsesssion ulimit options: rsession-memory-limit-mb, rsession-stack-limit-mb, and rsession-process-limit
• Changed Chrome close document shortcut to Cmd+Alt+W

• Avoid evaluating promises for objects in the workspace
• Recognize more object types as datasets (any object of class data.frame)
• Fix for browseVignettes function not working in server mode
• Prevent spurious console warnings when long vectors appear in the workspace
• Recover gracefully from plot export default directory being removed during a session
• Track multiple changes within a session to default export plot directory
• Ignore YAML front-matter that contains multi-line lists in R Markdown documents
• Prevent mis-detection of embedded R chunks in C++ files (space required before R on first line)
• Don't serve http content (javascript:false) when running behind an https proxy
• Fix for cursor positioning bug when using Safari 7.0
• Clear busy indicator after cancelling update packages
• Serve woff fonts with correct mime type (avoids warnings in javascript console)
• Ensure that the user's own group is checked when verifying that a user belongs to a group
• Fix for console interrupt button sometimes remaining active even when session is idle
• Enable copying of prompt text from within the console
• Navigate to help topics based on mouse selection (formerly requried keyboard selection)
• Ensure that Git revert requests with no valid files don't revert all unstaged changes
• Prevent RPM upgrade from removing rstudio-server script from /usr/sbin
• Fix for some text file types being incorrectly detected as binary on RedHat 5
• Detect R location within cmake configuration even when warnings or other spurious output are generated during R startup.
• Eliminate warnings which sometimes occurred when initializing default user package library
• Eliminate warnings which sometimes occurred when resizing graphics devices
• R 3.02 plots now correctly restore during session resume and build and reload
• R 3.02 plots that occur in rapid sequence without rendering in the UI now work correctly
• Prevent "parameter type mismatch" error when using manipulate
• Prevent error messages which could occur when restarting R from an already suspended session