Capistrano output can be colorized with capistrano_colors; Capistrano v2.13.5+ includes it, while older setups can load the gem manually.

Adds tabbed chat windows to Skype on Linux and combines the main app and conversations into one window.

Ruby bindings for a fast Markdown parser, with custom renderers for arbitrary output formats.

Paperclip image conversions can spike CPU and memory during heavy uploads. ImageMagick resource limits and nice help reduce contention on Unix systems.

--deployment can fail even when Gemfile.lock is committed if an unexpected file or directory has been copied into releases.

Aggregated test coverage for RSpec and Cucumber with rcov:all now supports Rails 2 and 3 and can ignore shared traits.

Code coverage can look misleading when blank lines and comments count against the ratio; RCov total coverage ignores them for a more useful metric.

Rails 2 can miss an association declared with a string name, causing "association not found" errors; using a symbol avoids the lookup bug.

Rails AssociationTypeMismatch errors often come from selecting an associated object instead of its ID in a form field.

Automatic browser updates aim to phase out IE6 and IE7, while Windows XP remains limited to Internet Explorer 8.

Ruby CLI scripts can break pipe chains when they ignore stdin, stdout, or exit codes. Careful stream handling keeps them composable in shell workflows.

ActionController::MethodNotAllowed errors often come from reloads or broken JavaScript links, and can be handled by redirecting back or to a fallback URL with a flash message.

less can leave Rails logfile escape sequences unreadable; less -R preserves ANSI colors and other control codes while browsing logs.

Vendor-prefixed CSS properties support browser-specific features but can complicate cross-browser styling and maintenance.

i18n-tasks helps keep Rails locale files complete by finding missing and unused translation keys and reducing manual YAML bookkeeping.

Rails submit buttons with :disable_with can stay disabled after back navigation, leaving forms unusable until they are re-enabled on page unload.

Non-standard CSS image scaling controls affect browser resampling and edge smoothness, but results are browser-specific and best avoided unless the target browser is certain.

Keeps lecture documents and other downloadable files collected from multiple web pages without manual checking, using a configurable URL and CSS selector.

Passenger and Apache can return 500 errors after adding Rack::Bug when the middleware is referenced as a string instead of loaded with require 'rack/bug'.

Application servers often compress responses with gzip, but Wget downloads the uncompressed version unless Accept-Encoding: gzip is sent.

Google Analytics should run only in production to avoid polluting visitor statistics. Rails environment checks can gate the tracking snippet.

Ruby framework for building command-line apps with parameter handling, utility classes, and Cucumber support for CLI testing.

Capistrano multistage recipes can fail with unknown role errors when a task targets a missing server group. Registering the role and skipping the task when no servers match prevents the failure.

Choose one array element at random in Ruby with sample; weighted_sample can bias the result toward specific values.