The mozilla-thunderbird ebuild tries to install the Enigmail extension if the CRYPT flag is set. This worked great in 0.6 (I think), but no longer works with the new extension system. Reproducible: Always Steps to Reproduce: 1. USE="crypt" emerge mozilla-thunderbird 2. thunderbird & 3. Try to use Enigmail.
I can confirm this bug. I just emerged mozilla-thunderbird with crypt USE flag. When I launched thunderbird it told me that it would disable old extensions enigmail is then unavailable. # emerge info Portage 2.0.50-r9 (default-x86-2004.0, gcc-3.3.3, glibc-2.3.3.20040420-r0, 2.6.7-gentoo-r11) ================================================================= System uname: 2.6.7-gentoo-r11 i686 Intel(R) Pentium(R) M processor 1500MHz Gentoo Base System version 1.4.16 Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.3 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=pentium4 -fomit-frame-pointer -pipe" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium4 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache sandbox" GENTOO_MIRRORS="ftp:///ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ ftp://mirrors.sec.informatik.tu-darmstadt.de/gentoo/ http://ftp.du.se/pub/os/gentoo http://ftp.ntua.gr/pub/linux/gentoo/" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X alsa apm arts avi berkdb crypt cups dvd encode foomaticdb gdbm gif gpm gtk gtk2 imlib java jpeg kde libg++ libwww mad matroska mikmod mmx motif mozilla mpeg ncurses nls oggvorbis opengl pam pdflib perl png python qt quicktime readline sdl slang spell sse ssl svga tcpd truetype x86 xml2 xv xvid zlib"
Thanks, I updated to enigmail-0.85 in mozilla-thunderbird-0.7.1-r1. It's ~arch right now but should see a quick turnaround