CPAN SIGBUS / SIGSEG on new Opteron x86_64

Brand new install of CentOS 64-bit 4.2 on an Opteron 246 machine.

perl -v = v5.8.5 built for x86_64-linux-thread-multi

I can't do a thing with CPAN.

On any action, I either get a Bus error:

cpan> install Apache
CPAN: Storable loaded ok
Going to read /home/.../.cpan/Metadata
Going to read /home/.../.cpan/sources/authors/01mailrc.txt.gz
Going to read /home/.../.cpan/sources/modules/02packages.details.txt.gz
   Database was generated on Thu, 19 Jan 2006 08:15:07 GMT
CPAN: HTTP::Date loaded ok
Bus error

GDB says:

Program received signal SIGBUS, Bus error.
[Switching to Thread 182894081088 (LWP 16608)]
0x0000003b86d91b10 in Perl_hv_clear_placeholders ()
    from /usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
(gdb) backtrace
#0  0x0000003b86d91b10 in Perl_hv_clear_placeholders ()
    from /usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#1  0x0000003b86d91ee6 in Perl_hv_clear_placeholders ()
    from /usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#2  0x0000003b86d9279c in Perl_he_dup () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#3  0x0000003b86d931ac in Perl_hv_fetch_ent () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#4  0x0000003b86d9f941 in Perl_pp_helem () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#5  0x0000003b86d827ea in Perl_runops_debug () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#6  0x0000003b86d3b594 in perl_run () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#7  0x00000000004019dc in main ()
(gdb)

Or a Segmentation fault:

cpan> install Apache
CPAN: Storable loaded ok
Going to read /home/.../.cpan/Metadata
Going to read /home/.../.cpan/sources/authors/01mailrc.txt.gz
Going to read /home/.../.cpan/sources/modules/02packages.details.txt.gz
   Database was generated on Thu, 19 Jan 2006 08:15:07 GMT
CPAN: HTTP::Date loaded ok
Going to read /home/.../.cpan/sources/modules/03modlist.data.gz
Segmentation fault

GDB says:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 182894081088 (LWP 16614)]
0x00000036cb37178b in _wordcopy_fwd_aligned () from /lib64/tls/libc.so.6
(gdb) backtrace
#0  0x00000036cb37178b in _wordcopy_fwd_aligned () from /lib64/tls/libc.so.6
#1  0x00000036cb370f13 in memmove () from /lib64/tls/libc.so.6
#2  0x0000003b86db399e in Perl_sv_setsv_flags () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#3  0x0000003b86db4f90 in Perl_sv_mortalcopy () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#4  0x0000003b86d9934e in Perl_pp_aassign () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#5  0x0000003b86d827ea in Perl_runops_debug () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#6  0x0000003b86d3a801 in Perl_call_sv () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#7  0x0000002a987e21a7 in XS_Opcode__safe_call_sv ()
    from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/auto/Opcode/Opcode.so
#8  0x0000003b86d9e99b in Perl_pp_entersub () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#9  0x0000003b86d827ea in Perl_runops_debug () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#10 0x0000003b86d3b594 in perl_run () from 
/usr/lib64/perl5/5.8.5/x86_64-linux-thread-multi/CORE/libperl.so
#11 0x00000000004019dc in main ()

Any ideas?

-Brian