When Yahoo! Messenger isn't closed properly, you may receive the following message:
"Yahoo! Messenger quit unexpectedly. Upon reopening it has loaded your Plug-ins in Safe Mode."
Because Yahoo! Messenger didn't close properly, all Plug-ins for Yahoo! Messenger are loaded in "Safe Mode," meaning the Plug-ins aren't started automatically when you open and sign into Yahoo! Messenger.
The plug-ins will need to be restarted for use. Here's how: