Acroread complains...

[Steven Friedrich]

When I run mozilla from the command line and ask it to open a pdf, it 
complains:
/usr/local/Acrobat5/Reader/intellinux/bin/acroread: error while loading shared 
libraries: /usr/local/lib/libartsdsp.so.0: ELF file OS ABI invalid

So I ran file on it:
% file /usr/local/lib/libartsdsp.so.0
/usr/local/lib/libartsdsp.so.0: ELF 32-bit LSB shared object, Intel 80386, 
version 1 (FreeBSD), not stripped

Ideas?
-- 
FreeBSD 4.11-STABLE