iWeb v3.0.4 (601) + Lion + Time Machine

Mac Book Pro, Lion Time Machine, wireless, iWeb

My Time machine won't unmount after a successful backup. (The desktop icon remains though the icon on the top bar says the backup was successfully finished.

Console has this message:

7/30/11 8:57:13.959 AM mdworker: (Error) ImportPluginLoading: Couldn't load plugin '/Library/Spotlight/iWeb.mdimporter/'

The fan runs hard after a while, the icon remains on the desktop.

What's up with the error message? How can this be corrected?

Thanks!