Now it works by showing me the growl notification but it doesn't seem to use settings from Growl (App store 1.4 version) and the console says so
"1Mail[33679]: GrowlMail could not reach Growl, GrowlMail is sandboxed and does not have the ability to talk to Growl, contact the developer to resolve this"
I'm more or less just aiming at reporting these things and will resolve to wait for Growl 2 and new official GrowlMail.
-rudy
that makes perfect sense, since the UUIDs that were committed are for up to 10.8.1.
Getting it working on 10.8 amounted to 2 lines worth of code changes
The plan at this point is to not release an update for 10.6, to release one final update for 10.7 and to rewrite GrowlMail entirely for 10.8.