Get it from:
https://code.google.com/p/yubikey-personalization/downloads/list?q=1.6.1
SHA-1 and SHA-224 hash values:
39ef063bcb17cb62e4a7a282db3a0ee896290e41 ykpers-1.6.1.tar.gz
0627828d1d7b45d4b05264c3bbb3d62ee592d2e4 ykpers-1.6.1-win32.zip
28103915ea2a1798e9dfaa15a0fa0135b5bf0ea4 ykpers-1.6.1-win64.zip
dcb8db0d4b20bf5b7f9aaac0651080af75e52ecea894dc54ce71039e ykpers-1.6.1.tar.gz
7ac32bd63a251060aa82e303bd83e6f6e29bd4bbf020beffbad3427c ykpers-1.6.1-win32.zip
5d4befe56854ef8903b8dd43db88f532b7183adc2b3ea82c2c15799f ykpers-1.6.1-win64.zip
* Version 1.6.1 (released 2011-08-15)
** Fix test_args_to_config crash on some platform.
The problem was due to mixing PIC and non-PIC object code.
/Simon