Uncomplex has released Mailplane 3.3, which now automatically signs out accounts with empty passwords as well as clearing cookies and caches when quitting. The Gmail-specific email client also enables you to preview and download attachments shared from Google Drive, plus open Google Docs in an external Web browser. The release also fixes the bulleted list insertion (Command-Shift-8) so that it works in a pop-out window, prevents inline images from being inserted into plain text messages, opens Google Hangouts if opened via a Google Calendar event, and ensures that print works if a language other than English was selected. ($24.95 new, free update, 17.4 MB, release notes, 10.7+)
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.