After upgrading from 4.0.3 to 188.8.131.5285 on AIX 6.1 using LAM, receiving double prompts for su.
From root, su to any user, from that user su to themselves again or su to another user and you will be prompted twice for a password.
The first password prompt is ignored, it doesn't matter if you put in the correct password / incorrect password or leave it blank and just hit enter.
Second password prompt authenticates with the correct password only.
Product Defect: 330182 due to an operating system code change in AIX 6.1 we now need an additional setting in methods.cfg
Product Defect 337571
Pending fix in future release.