There has been a release of Perl on RedHat that causes SellerDeck sites to fail. The currently known scenario is for adding multiple products using a single add-to-cart button results in the error :
A General Script Error Occurred
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Error: Invalid section ID number.
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The version of perl known to have the bug is perl-5.8.8-15.el5_2.1
The prior version known to work is perl-5.8.8-10.el5_2.3
You should contact your host and ask them to revert to the version that works.
A General Script Error Occurred
---------------------------------------------------------------------------
Error: Invalid section ID number.
---------------------------------------------------------------------------
The version of perl known to have the bug is perl-5.8.8-15.el5_2.1
The prior version known to work is perl-5.8.8-10.el5_2.3
You should contact your host and ask them to revert to the version that works.