I didn't see this listed as a known bug, although I'm assuming the developer
knows about it, since there are only "linux_x86.plt" and "windows.plt" folders
available.  

$ ldd postgresql-sdbc.uno.so 
	linux-gate.so.1 =>  (0xf7faf000)
	libuno_cppu.so.3 => not found
	libuno_cppuhelpergcc3.so.3 => not found
	libuno_sal.so.3 => not found
	libdl.so.2 => /lib/libdl.so.2 (0xf7f79000)
	libpthread.so.0 => /lib/libpthread.so.0 (0xf7f5e000)
	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xf7e71000)
	libm.so.6 => /lib/libm.so.6 (0xf7e49000)
	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xf7e1e000)
	libc.so.6 => /lib/libc.so.6 (0xf7cac000)
	/lib/ld-linux.so.2 (0x0093e000)

So, it's a similar problem to bug #77188, except on x86_64