Rails 2.3 can use the Rails 3.1 asset pipeline through a backport for managing and serving static assets.

Facebook API access is limited to 600 requests per 600 seconds; polling more often can return empty or malformed responses.

Cloud compilation turns web apps into app-store ready builds for iOS, Android, Windows Phone, BlackBerry and more without changing your HTML, CSS or JavaScript workflow.

Nested drag-and-drop for reorderable trees is hard when items can be leaves or containers; precise drop targets need custom JavaScript, CSS, and testing support.

link_to and content_tag accept a :data hash for HTML5 data attributes in Rails 3, simplifying data-foo and data-bam output.

MySQL can record every received query for debugging at the cost of performance. Enabling the general query log helps inspect database activity on non-production systems.

Custom $.cssHooks normalize browser-specific CSS properties and extend .css() and .animate() handling for inconsistent style values.

Hidden-element checks in Capybara can fail in Selenium when visibility is inferred too loosely. A JavaScript-based step works across Selenium, jQuery, Prototype, and Rack::Test.

A Skype bug could send messages to the wrong recipients, including people outside your contacts. Upgrade to a fixed version immediately.

Determining whether an element is truly visible in the browser can differ across JavaScript libraries; jQuery and Prototype use different visibility rules.

Pinned editor tabs keep important files visible in RubyMine while temporary search results can be closed without losing context.

Clicking arbitrary page text can target any HTML element with a JavaScript handler, not just links or buttons, in Selenium features.

Account profiles now provide a personal RSS feed with the newest public and private cards across all decks.

Short code snippets can be misclassified by automatic syntax highlighting; explicitly declaring the language or using text avoids wrong highlighting or disables it.

Bundler can fail on fresh Ubuntu installs with no such file to load -- net/https when Ruby lacks OpenSSL bindings, blocking gem downloads.

Dynamic Ruby methods can return false negatives with respond_to?, breaking gems and method lookups unless respond_to_missing? matches method_missing.

Textarea resizing in Chrome, Safari, and Firefox can disrupt layouts; limiting maximum width and height keeps the box controlled while still allowing optional user resizing.

Reusable Gherkin steps can be chained inside a new step definition with steps or step, but steps only processes lines starting with Gherkin keywords.

RabbitMQ plugins on Ubuntu 12.04 require the full rabbitmq-plugins path because the binary is not in the default PATH.

Run an older Bundler release for compatibility when Rails or another project is pinned to a specific gem version.

Rails 3.1 lets a single change migration run forward and backward automatically, while irreversible updates are skipped during rollback.

Stop the terminal from jumping back to the bottom when new output appears, so you can inspect logs or test failures without losing your place.

Final bugfix release for Ruby 1.8.7, with another year of security fixes before patches end.