btw, i can't confirm that here on FreeBSD with 0.2.3.
I've activate all the plugins (apart from Bugzilla and Geolocalized tasks, because FreeBSD ports repository didn't has required dependencies), then restart GTG and all the plugins appeared on panel and in Plugins menu.
So this seems some ubuntu-specific thingie.
Is there any errors when you start gtg from terminal and trying to activate the plugins?
btw, i can't confirm that here on FreeBSD with 0.2.3.
I've activate all the plugins (apart from Bugzilla and Geolocalized tasks, because FreeBSD ports repository didn't has required dependencies), then restart GTG and all the plugins appeared on panel and in Plugins menu.
So this seems some ubuntu-specific thingie.
Is there any errors when you start gtg from terminal and trying to activate the plugins?