Recent versions of Chrome appear to be forestalling execution of the Flash plug-in when running in tabs other than the currently active tab. This has the effect that if you open a tree view in a new tab but remain on your existing tab, the tree doesn't load -- when you switch to the tree tab, the spinner is seen running until the tree eventually draws.
Chrome has a setting that allows you to override this behavior for designated web sites. To enable Geni trees to draw on inactive tabs, do the following:
- Click the "hamburger" menu, Settings, Show advanced settings...
- Under Privacy click the button labeled "Site Settings" or "Content settings..."
- Scroll down to Plugins and select the radio button labeled "Detect and run important plugin content"
- Click the button labeled Manage exceptions...
- Scroll to the bottom of the list and add "[*.]www.geni.com" / "Allow" and click Done