Why do the yellow tooltips appear even when Dashboard is closed?

This is a bug in Dashboard itself unfortunately. We've reported the problem to Apple and we're hoping they'll fix it. In the meantime, there is a hidden setting to disable the tooltips that show delivery details. Open Terminal, enter this on one line, then press return:
defaults write widget-com.junecloud.widget.deliverystatus disabletooltips 1; killall Dock;

To turn the tooltips back on, enter:
defaults delete widget-com.junecloud.widget.deliverystatus disabletooltips; killall Dock;

Software

Notefile Alfred Workflows To use these workflows, you will need Notefile for Mac, Alfred 2, and the Alfred Powerpack. To install the…

Delivery Status Alfred Workflow To use this workflow, you will need Delivery Status for iOS or Delivery Status Widget for Mac, Alfred 2, and…

Delivery Status 5.1 for iOS Available on the App Store Delivery Status helps you keep track of all your packages, so you always know…