Slackware 12.2 was released yesterday and being a minor release I didn't think an upgrade would cause many problems, but it broke fwknop!

The error message I get is:
/usr/bin/perl: symbol lookup error: /usr/lib/fwknop/i486-linux-thread-multi/auto/Digest/SHA/SHA.so: undefined symbol: Perl_Tstack_sp_ptr

Both 'fwknop' and 'fwknopd' generate this error message.

Can anyone give me any advice on how to debug this and get it working again?

Thanks
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