--- ./mozilla/mail/app/profile/all-thunderbird.js.check	2006-12-01 04:57:58.000000000 -0200
+++ ./mozilla/mail/app/profile/all-thunderbird.js	2007-02-05 17:05:43.000000000 -0200
@@ -135,7 +135,7 @@
 pref("xpinstall.whitelist.add", "update.mozilla.org");
 pref("xpinstall.whitelist.add.103", "addons.mozilla.org");
 
-pref("mail.shell.checkDefaultClient", true);
+pref("mail.shell.checkDefaultClient", false);
 pref("mail.spellcheck.inline", true);
 pref("mail.showPreviewText", true); // enables preview text in mail alerts and folder tooltips