Forum OpenACS Q&A: Re: Re: Fixes for Oracle 10g since OpenACS 5.1.5.x June 2005 ?,

You also need to adapt version comparison -- for 10g (10.2.0.1), OpenACS picks up "10.2.0", and because this and "8.1.6" don't look like number, Tcl does a (dictionary) string comparison.

See https://openacs.org/bugtracker/openacs/bug?bug%5fnumber=2961 and its fix, patch # 800.