I have an ubuntu 10.04 server. the other day i attempted to upgrade perl using perl -MCPAN -e 'upgrade'. in the end it failed. today, i tried to do a do-release-upgrade, which failed due to some perl errors. right now even if i try to do the perl upgrade again, i am getting the following errors:

Can't locate feature.pm in @INC (@INC contains: /usr/share/perl/5.14.2
+ /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /u
+sr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10
+ /usr/local/lib/site_perl /opt) at /usr/local/share/perl/5.10.1/Text/
+Tabs.pm line 15.
BEGIN failed--compilation aborted at /usr/local/share/perl/5.10.1/Text
+/Tabs.pm line 15.
BEGIN failed--compilation aborted at /usr/local/share/perl/5.10.1/Text
+/Tabs.pm line 15.
Compilation failed in require at /usr/local/share/perl/5.10.1/Text/Wra
+p.pm line 35.
BEGIN failed--compilation aborted at /usr/local/share/perl/5.10.1/Text
+/Wrap.pm line 35.
Compilation failed in require at /usr/share/perl/5.14.2//CPAN.pm line 
+58.
BEGIN failed--compilation aborted at /usr/share/perl/5.14.2//CPAN.pm l
+ine 58.
Compilation failed in require.
BEGIN failed--compilation aborted.
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Could someone please help me fix this? is there a way to downgrade back to 5.10.1? or force an ubuntu reinstall of 5.10.1? your help will be much appreciated. Thanks Joe