Font Awesome 4 icon names differ from Font Awesome 5, where each name is valid only together with an icon set name.

Typing d in a Geordi VNC browser can switch to a grey screen; pressing d again brings the browser back.

Firefox suppresses focus and blur events when its window is unfocused, making Selenium tests flaky in parallel execution. ChromeDriver is the recommended workaround.

Nested patiently blocks now wait independently in Spreewald, preventing detached DOM failures when with_scope reuses cached elements.

Limited PostgreSQL privileges can block database cleanup, dump imports, and storage-path queries; granting the application user superuser rights avoids PG::InsufficientPrivilege.

VNC viewer startup can fail with “Connection refused” when the geordi session server on display :17 is hung or still locked. Restarting the server and removing the stale lock file restores access.

MySQL 5.6 rejects default values on BLOB and TEXT columns, blocking migrations that rely on them. Adjust the migration, move defaults into the application, or temporarily change sql_mode.

Ruby 1.8.7 test runs can fail with Gem::LOADED_SPECS_MUTEX NameError under older Bundler; Bundler 1.16.1 resolves it.

Rails render accepts HTTP status symbols such as :bad_request, making responses more readable than numeric codes.

Use curl to drive Chromedriver directly for simple debugging, opening pages, finding elements, and reading text without selenium-webdriver.

Ruby 2.3+ supports <<~ for automatic HEREDOC unindentation; older versions can use ActiveSupport's String#strip_heredoc to remove common leading whitespace.

High-resolution website screenshots can be captured in Chrome without add-ons, producing PNGs suitable for print and Retina displays.

Pending RSpec examples need a failing body; otherwise a passing pending example is treated as a failure. Omit the body, add fail, or skip with xit/xdescribe.

1.year returns a Float in Rails < 4 and can break code that expects an integer duration; Rails 4 uses ActiveSupport::Duration instead.

Using application or provider names in variable and method names makes code brittle during replacements and extensions; abstract, reusable names reduce renaming and adaptation work.

Katapult 0.4.0 adds application-model associations and can generate a project README for Rails-style project scaffolding.

Pending Cucumber steps can fail when VCR cassettes contain unused HTTP interactions; @allow_unused_http_interactions can be enabled only for pending features.

Katapult 0.3.0 adds Rails 5.1.4 and Ruby 2.5.0 support, a new Bootstrap-based design, Webpacker, and workflow and test improvements.

all? returns true on empty collections, which can accidentally match missing associations and lead to unwanted deletions or other false positives.

Move a repository between Git hosts without losing branches, tags, or untracked commits. Mirroring the old remote to the new one keeps the destination in sync.

Capybara step for checking an image by matching part of its src against a filename and extension during browser tests.