I have tried upgrading but now cannot launch MCC. I get this error

Can't load '/usr/lib/perl5/vendor_perl/5.10.0/x86_64-linux-thread-multi/auto/Gtk2/Gtk2.so' for module Gtk2: /usr/lib/perl5/vendor_perl/5.10.0/x86_64-linux-thread-multi/auto/Gtk2/Gtk2.so: undefined symbol: pango_layout_iter_copy at /usr/lib/perl5/5.10.0/x86_64-linux-thread-multi/DynaLoader.pm line 203.
at /usr/lib/libDrakX/mygtk2.pm line 14
Compilation failed in require at /usr/lib/libDrakX/mygtk2.pm line 14.
BEGIN failed--compilation aborted at /usr/lib/libDrakX/mygtk2.pm line 14.
Compilation failed in require at /usr/sbin/drakconf.real line 35.
BEGIN failed--compilation aborted at /usr/sbin/drakconf.real line 35.

since no-one has replied I suggest you copy your data files as required and do a clean install

BTW , YMMV but I never recommend anyone to use 64 bit at this stage....there is better range of software with 32 bit and modern computers with decent ram and cpu ...bus speed etc have little difference in loss of ability to hold more in ram that 64 bit offers...versus the ease of 32 bit apps.

My installer didn't let me use 32 bit. I tried that and it yelled at me. I have not tried a fresh install of 2008.1 using 32bit on my laptop.

BTW, I did an "install" using the disks (upgrade option) which took about 5 seconds and everything is working again.