Yes, I am on a 32-bit Intel box (i386 packages) and I really do not have /usr/lib/libnetsnmp.so.9. "ldd cupsext.so" tells me that it links with libnetsnmp.so.10. My "sudo dpkg -P libsnmp9" has run "ldconfig", which was probably not run when you moved libraries manually. Can you try to simply run "sudo ldconfig"? Perhaps this helps.
Yes, I am on a 32-bit Intel box (i386 packages) and I really do not have /usr/lib/ libnetsnmp. so.9. "ldd cupsext.so" tells me that it links with libnetsnmp.so.10. My "sudo dpkg -P libsnmp9" has run "ldconfig", which was probably not run when you moved libraries manually. Can you try to simply run "sudo ldconfig"? Perhaps this helps.