The -u option to ps has a max uid that is lower than the 2.4 kernels max
(as in ps thinks 16-bit, the kernel does 32-bit). If I create a user with
a large uid (100000 for example) and then do a ps -fu <user> I get:
ps: error: User ID out of range
This defect is considered MUST-FIX for Florence Gold release
fixed in 2.0.7-5 and later.