Bio::DB::Sam error: undefined symbol: Perl_Gthr_key_ptr

Hi

I have a problem using Bio::DB::Sam

Like other perl modules I installed Bio-SamTools-1.36 in my home
directory, since I do not have administration rights to the server I am
using. When I call

use Bio::DB::Sam

I get the following error:

/usr/local/bin/perl: symbol lookup error:
/home/gwo/perl/modules/lib/perl/5.10.1/auto/Clone/Clone.so: undefined symbol: Perl_Gthr_key_ptr

Both Bio::DB::Sam and Clone.pm were installed under the same version of
perl (perl v5.10.1, Ubuntu 11.04)

Any idea what is going on?

Best wishes,

Georg