bootstrap for me worked fine on August 6th.  Today (August 7th) it fails with:

gmake[6]: Entering directory `/u01/var/tmp/gcc_trunk_svn/gcc_20070807/gcc'
/u01/var/tmp/gcc_trunk_svn/gcc_20070807/./gcc/xgcc -B/u01/var/tmp/gcc_trunk_svn/gcc_20070807/./gcc/ -B/opt/gcc-4.3/i386-pc-solaris2.11/bin/ -B/opt/gcc-4.3/i386-pc-solaris2.11/lib/ -isystem /opt/gcc-4.3/i386-pc-solaris2.11/include -isystem /opt/gcc-4.3/i386-pc-solaris2.11/sys-include -O2 -O2 -msse2 -march=native -mtune=native -O3  -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -I. -I/u01/var/tmp/gcc_trunk_svn/gcc_20070807/i386-pc-solaris2.11/amd64/libgcc -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc//u01/var/tmp/gcc_trunk_svn/gcc_20070807/i386-pc-solaris2.11/amd64/libgcc -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc/../include -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc/../libcpp/include -I/usr/local/include -I/usr/local/include -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc/../libdecnumber -I/u01/var/tmp/gcc_trunk_svn/gcc/gcc/../libdecnumber/dpd -I../libdecnumber -g -fkeep-inline-functions -m64 -g0 -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder  -fno-omit-frame-pointer -fno-asynchronous-unwind-tables \
          -c /u01/var/tmp/gcc_trunk_svn/gcc/gcc/crtstuff.c -DCRT_BEGIN \
          -o /u01/var/tmp/gcc_trunk_svn/gcc_20070807/i386-pc-solaris2.11/amd64/libgcc/crtbegin.o
/var/tmp//ccjpaqV3.s: Assembler messages:
/var/tmp//ccjpaqV3.s:91: Error: suffix or operands invalid for `pop'
/var/tmp//ccjpaqV3.s:92: Error: Incorrect register `%rdx' used with `l' suffix
gmake[6]: *** [/u01/var/tmp/gcc_trunk_svn/gcc_20070807/i386-pc-solaris2.11/amd64/libgcc/crtbegin.o] Error 1

This is from my nightly build of trunk, with no config changes on the server.  Let me know if you need more information to debug.

Brett Albertson