I rebuilt my PC and decided to go, pretty much, for an open source configuration so I have Open Office, Firefox, Thunderbird and so on. They work well but I have had a problem using Firefox/Thunderbird extensions.

The thing I really like about Outlook is the way I can make it minimise to the system tray ... so I looked for a Thunderbird extension to do the same and found one. It worked fine until I rebooted ... now I find that several applications (including notepad) can't restore. I can minimise them, maximise them but I can't bring them to a windowed status.

I figure there has to be a registry setting for this so I wondered if anyone had any ideas?