[MinimizeToTray] MinimizeToTray plugin on Thunderbird 3a1

[Geert]

Hello,

I've upgraded my Thunderbird (normal public latest downloadable version) to
version 3a1, in order to have control over the tray-icon when a new mail
arrives. (see https://bugzilla.mozilla.org/show_bug.cgi?id=283425)

But as you already know, MinimizeToTray doesn't work (or doesn't want to
install) on this new version of Thunderbird.

Do you have a workaround for this?  Or can you release a version of
MinimizeToTray that works with Version 3a1? 

I'd really like to use your plugin, but I'd also like not having the tray-icon
when a new mail arrives ...

Thanks in advance for your time,
kind reagards,
Geert.