Mac TorBrowserBundle won't run if the path to TorBrowser_en-US.app has spaces
With the Mac OS X TorBrowserBundle: If you extract or place the TorBrowser_en-US.app file in a folder that has spaces in its name (e.g. "/Users/username/Random Applications/TorBrowser_en-US.app") then it won't run... it won't even throw an error up to the user, you have to go into Console.
Console reveals the following messages: 4/9/11 3:58:22 PM [0x0-0x325325].org.torproject.TorBrowserBundle Launching Tor Browser Bundle for Mac OS X in /Users/username/Random Applications/TorBrowser_en-US.app/
4/9/11 3:58:22 PM [0x0-0x325325].org.torproject.TorBrowserBundle The files /Users/username/Random and /Users/e-daily/Random Applications/TorBrowser_en-US.app/Applications/TorBrowser_en-US.app/Contents/MacOS/Vidalia.app do not exist.